Patran 2008 r1 Reference Manual Part 7: XY Plotting

Patran 2008 r1

Reference ManualPart 7: XY Plotting

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Con t en t s

Patran Reference Manual

1 Overview of the XY Plot Application

Purpose 2

General Definitions 3

Task Structure 4

Description of XY Window Display Components 5

XY Window Display Components 7

XY Plot Capabilities 8

Summary of Key Features 10

How Curves are Created 12

XY Plot Data Structures 13

Plot Specifications for Curves 14

Axes Scales and Labels 15

Preparing Curve Data Files 16

Data Set Format 16

Records 16

Format for Data Point Values 17

Example 17

Naming Conventions 18

Filenames for Curve Data Files 18

Names of XY Windows, Curves, and Titles 18

Notes on Managing XY Plots 19

Displaying New Curves 19

Effect of Changing the Active Color Table 19

Background Colors 19

Using Colors, Line Styles, and Data Point Symbol Types to Visually Distinguish

Curves 19

Locating Titles and Legend Boxes 20

Multi-Line Titles 20


iv

2 XY Plot Forms

Overview of XY Plot Actions 22

Create Actions 23

Create a New XY Window 23

Create a New Curve 24

Create a New Title 31

Post Actions 33

Post/Unpost XY Windows, and Select Current XY Window 33

Post/Unpost Curves in Current XY Window 35

Post/Unpost Titles in Current XY Window 37

Modify Actions 39

Modify Graph Area Options for Current XY Window 39

Modify a Defined Curve 41

Modify a Title 46

Modify Axis Option 48

Modify Legend Display Attributes 58

Rename Actions 60

Rename an XY Window 60

Rename a Curve 62

Rename a Title 63

Delete Actions 64

Delete an XY Window 64

Delete a Curve 65

Delete a Title 66

INDEXIndex

Ch. 1: Overview of the XY Plot Application Patran User’s Guide

1 Overview of the XY Plot

Application

� Purpose 2

� General Definitions 3

� Task Structure 4

� Description of XY Window Display Components 5

� XY Plot Capabilities 8

� Summary of Key Features 10

� How Curves are Created 12

� XY Plot Data Structures 13

� Plot Specifications for Curves 14

� Axes Scales and Labels 15

� Preparing Curve Data Files 16

� Naming Conventions 18

� Notes on Managing XY Plots 19

Patran User’s GuidePurpose

2

Purpose

The XY Plot Application (hereafter called XY Plot) creates and manages the definitions of XY windows,

which are graphic windows in which curves are plotted. XY Plot also creates and manages the definitions

of curves and titles, and manages the display of XY plot information. Task Structure, 4 gives a correlation

of the basic tasks described below with the forms used to carry out those tasks. See Description of XY

Window Display Components, 5 for a description of the various display elements that appear in an XY

window.

Management of XY Window Definitions

XY Plot manages the following XY window elements:

• Window name.

• Display, label, and scale specifications for the axes that appear in the

graph area.

• Display specifications for axis tick marks and plot gridlines.

• Display specifications for a legend box that appears outside the graph

area.

Management of Curve Definitions

Each curve definition includes the following elements:

• Curve data; consisting of a curve name, title, data type identifier, and set

of data points to be plotted.

• Curve display and plot specifications.

Curve data can also be exported to a new or existing curve data file, which

are external files stored in directories.

See How Curves are Created, 12 for a description of the ways in which new

curves are created.

Management of Title Definitions

Each Title definition includes the title name, the title text, and the display

specifications.

Management of XY Window Displays

Selected XY windows are posted for display on the screen. Any XY window

can be selected as the current XY window. Curve(s) and title(s) are posted for

display in the current XY window. The current XY window is the only XY

window whose graph area, legend, axes, tick marks, and gridline display

options can be modified.

3Ch. 1: Overview of the XY Plot ApplicationGeneral Definitions

General Definitions

XY Plot XY Plot is the application that creates and manages definitions of XY windows

(graphics windows wherein XY curves are plotted).

XY window An XY window is a graphics window which contains a plotting area for XY curves,

an X and Y axis, XY titles, and a legend. Each window has a name which uniquely

designates the XY window and is displayed in the title bar of the window.

XY curve An XY curve is the basic entity of data which is plotted within XY windows. The

curve consists of a number of X-Y points or Y only points which represent a curve

that is to be graphically displayed. Each curve has a name which is used to uniquely

designate the curve and a title which is used for display within the legend. Attributes

of a curve include the color of the curve and curve title, curve display methods, and

point symbol attributes. Each curve can be posted for display to as many XY

windows as is desired.

XY title An XY title is a text string which is displayed anywhere within an XY window and

is normally used for annotation of an XY plot. Each title has a name which is used to

uniquely designate the title and text actually displayed when the title is posted to an

XY window. Attributes of a title include its location, color, and size. Each title can

be posted for display to as many XY windows as is desired.

XY axes XY axes are a part of an XY window. There is an X and Y axis for each XY window

and each axis can be independently modified. Attributes of an axis include location,

color, tick mark and gridline display, and title and label color and size. Each axis also

defines the scaling that will be used for display of XY curves within the XY window.

Several scaling methods are available including linear and logarithmic scales and

automatic or manual control of ranges.

XY legend An XY legend is part of an XY window. The legend is a rectangular area within

which a table of the curves posted to the XY window are displayed. The legend

display consists of a legend title and for each curve, an example of the curve display

and the text for the curve title. Attributes of a legend include location, size, border

display, and background color.

Patran User’s GuideTask Structure

4

Task Structure

The diagram below groups the forms used in XY Plot into tasks described in Purpose, 2. Each variation

of the form is produced by selecting an action and an object. Subordinate forms, which are associated

with particular application form variations, are also shown.

CreateXY

Window

ModifyXY

Window

CreateCurve

ModifyCurve

CreateTitle

ModifyTitle

CurveNameTitle

CurveOptions

Data Attributes

Curve Data File

Curve DataKeyboard

Write Curve Data File

ModifyAxis

AxisOptions

AxisScale

AxisLabels

AxisTitle

Tick Marks

Gridlines

PostXY

Window

Post Curve

PostTitle

DeleteXY

Window

Delete Title

RenameXY

Window

ModifyLegend

Legend

Manage XY WindowDefinitions

Export CurveData to a File

Manage Curve Definitions

Delete Curve

Manage

DefinitionsTitle

Manage XY PlotDisplays

Rename Curve

Rename Title

Legend

Application Form

Subordinate Form

5Ch. 1: Overview of the XY Plot ApplicationDescription of XY Window Display Components

Description of XY Window Display Components

The following table illustrates the attributes of XY Plot display elements.

Patran User’s GuideDescription of XY Window Display Components

6

XY Window Legend Title Curve Axes

Background Color

Border Color

Border Thickness

Border Linestyle

Location

Size

Title String Color

Background Color

Border Color

Border Linestyle

Text

Location

Color

Character Size

Title

Curve Name Color in Legend Box

Curve Color

Curve Thickness

Curve Style

Curve Fit Method

Symbol Color

Symbol Size

Symbol Type

Specifications:

• Curve Data

Attributes

• Curve Fit

Method

Axes Titles:

• Text String

• Color

• Font Size

Axes Specifications:

• Location

• Scale

• Minimum-

Maximum Range

• Number of

Primary Tick

Marks

• Increment

between Primary

Tick Marks

• Line Color

• Line Thickness

• Line Style

Tick Marks:

• Location

• Number of

Secondary Marks

• Color

• Line Thickness

Gridlines:

• Line Color

• Line Thickness

• Line Style

Numeric Labels:

• Format

• Color

• Number of

Significant Digits

7Ch. 1: Overview of the XY Plot ApplicationDescription of XY Window Display Components

XY Window Display Components

The following graphic shows a typical XY window. The XY Plot window is identified by the window

bar, which includes the database name. The cyan window border identifies the window as the current XY

window. In this example, the curve named “Curve No. 1” is posted.

Each curve definition includes its data points, plot specifications, and display attributes

Legend box. Lists all curves posted to this window, along with a sample of each curve’s plot line and data point symbol.

tfkalt=qfqib=

v=^ufp=

u=^ufp=

uv=mäçíW=Ç~í~Ä~ëÉ|å~ãÉW=ñó|ïáåÇçï=

-2.00 -1.00 1.00 2.00 3.00-3.00 0.

-2.00

-1.00

1.00

2.00

3.00

-3.00

0.

LEGEND

“Curve No. 1"

Patran User’s GuideXY Plot Capabilities

8

XY Plot Capabilities

Select XY Plot from the Patran window to display the XY Plot application form. The following activities

can then be accomplished by selecting the indicated action/object combination on the applicable form.

Click on any object name in the object column below to obtain more help about the action/object

combination.

Action Activity Object

Create Create a new XY window definition. XY Window

Create a new curve definition by importing data from a

curve data file.

Curve

Create a new curve definition by entering data points into

a spreadsheet.

Export curve data points to a text file.

Create a new title definition. Title

Post Select the current XY window. XY Window

Post/unpost selected XY window(s) for display.

Post/unpost selected curve(s) in the current XY window. Curve

Post/unpost selected title(s) in the current XY window. Title

Modify Show/Modify display attributes for the current XY

window’s graph area.

XY Window

Show/Modify a selected curve’s data points, curve’s

display, and plot attributes.

Export curve data points to a text file.

Curve

Show/Modify the display attributes for a selected title. TitleTitle

Show/Modify the display, label, and scale attributes for

the axes in the current XY window.

Axis

Show/Modify the display attributes for the tick marks in

the current XY window.

Axis

Show/Modify the display attributes for the gridlines in the

current XY window.

Axis

Show/Modify the display attributes for the legend box in

the current XY window.

Legend

Rename Rename an XY window. XY Window

Rename a curve. Curve

Rename a title. Title

9Ch. 1: Overview of the XY Plot ApplicationXY Plot Capabilities

Delete Remove selected XY window(s) from the database and

from display.

XY Window

Remove selected curve(s) from the database and from

display.

Curve

Remove selected title(s) from the database and from

display.

Title

Action Activity Object

Patran User’s GuideSummary of Key Features

10

Summary of Key Features

Feature Description

Multiple XY Windows Multiple XY windows can be defined. Any number of defined windows

can be posted for simultaneous display. Any number of curves and titles can

be posted for display in any window. The same curve or title can be posted

to more than one XY window.

Current XY Window One window is selected as the current XY window. The current XY

window is identified by a cyan inner border. It is the only one whose graph

area, axis, tick marks, gridlines, and legend display attributes can be

modified. Curves and window titles can only be posted/unposted in the

current XY window.

Curve Display Each curve has its own set of plot specifications and display attributes.

Using the Post Curve action, one or more curves (selected from a global list

of defined curves) can be posted for plotting in the current XY window.

Title Display Each title has its own set of display attributes. Using the Post Title action,

one or more titles (selected from a global list of defined titles) can be posted

for display in the current XY window.

Legend Box Display For each curve posted to an XY window, the XY window’s legend box

displays the curve’s title and a sample of its plot line and data point symbol.

Each XY window definition includes a set of legend box display attributes.

Graph Area Display Each XY window definition includes a set of graph area display attributes

in which posted curves are plotted.

Axes Display Each XY window definition includes the following axes display attributes:

Axis Line and Title: Display attributes, such as color, font size, and line

thickness, are used to define the axis line and axis title.

Scale: Either linear or logarithmic axis scale can be selected. The number

of primary tick marks, the min-max range, and the increment between

primary tick marks can be entered manually, calculated automatically, or

semi-automatically from the plotted data points of the posted curves.

Label: Display attributes, including the axis label format, are used to define

the labels appearing at each primary tick mark on each axis.

Tick Marks: Separate sets of display attributes are used to define the

primary and secondary tick marks that can be selected for display along

each axis line.

Gridlines: Separate sets of display attributes are used to define the primary

and secondary gridlines that can be selected for display. Gridlines originate

at tick marks and extend through the graph area.

11Ch. 1: Overview of the XY Plot ApplicationSummary of Key Features

Show/Modify a Curve’s Data Point Values

Any selected curve’s X and/or Y data point values can be displayed in

spreadsheet form. Values appearing in this form can modified. The data

point values in the spreadsheet can also be exported to a curve data file.

Hardcopy Output A posted XY window(s) can be selected for output to a hardcopy file

(named patran.hrd). This file is translated to a device-specific

hardcopy file and may be sent to a printer to produce a hardcopy of an XY

window.

Feature Description

Patran User’s GuideHow Curves are Created

12

How Curves are Created

New curves are created in any of the following ways:

The Create Curve action may be used to import curve data from a curve data file. See Import Curve

Data from an External File, 25. Curve data files, which are ASCII text files stored in directories, can be

created by XY Plot as described in Write Curve Data to a Curve Data File, 29. New curves can also be

created by systems, applications or editors external to Patran as described in Preparing Curve Data Files,

16. A curve data file contains one or more data sets. Each data set includes the curve data type identifier,

data points, and (optionally) the title for a single curve. XY Plot reads a selected data set from the file

and stores the data in the model database under the name specified by the user. The standard Patran file

extension.xyd is used for identifying curve data files.

The Create Curve action may be used to create a new curve whose name, data type, and data points

are specified by XY Plot. In Create/Modify/Display a Curve’s Data Points, 27, the Curve Data Keyboard

form is described, which is used to specify the curve data type and data point values.

The originating Patran application (e.g., Results, Fields, Materials, Loads and Boundary Conditions)

may be used to write the new curve data including the name, title, data type, and data point set to the

model database. These curves are posted to an XY window named XyWindow1. This window, along with

the newly created curves, is automatically posted. The curve name assigned by the originating

application, as well as the XY window created by the application, is included in XY Plot’s list of defined

curves and XY windows. This XY window, and the curves created by the originating application, can be

modified with XY Plot.

Regardless of the method used to create the curve, the curve data type identifier must indicate whether

data points are defined by a pair of X and Y values (type XY Pairs) or by a single Y value (type Y Data).

Once a curve has been created, the Modify Curve action described in Modify Actions, 39 is used to specify

the curve’s plot specifications and display attributes.

13Ch. 1: Overview of the XY Plot ApplicationXY Plot Data Structures

XY Plot Data Structures

The diagram below shows the data structures created for each XY window, each curve, and each title.

The diagram also shows the action(s) that update the elements in these data structures. Curve data (i.e.,

name, data type, and set of data points) can be imported from, or exported to, a curve data file.

Patran User’s GuidePlot Specifications for Curves

14

Plot Specifications for Curves

Each curve definition includes the following parameters that specify how the curve is plotted in an XY

window where it is posted:

Start and End Points. The number of the first and last data point to be plotted. The default start point is

data point 1 and the default end point is the last data point in the curve data.

Scale Factors. The X and Y data point values to be plotted are multiplied by the scale factors. The default

scale factor is set to 1.

Frequency. This value specifies the interval between plotted data points. The default value of 1 is used

when all data points between the start and end points are to be plotted. If a value (n) greater than 1 is

specified, every nth data point is plotted. Thus, a frequency value greater than 1 produces filtering of the

data.

Values of X. If the curve data type is Y Data (i.e., only Y data values are specified in the curve’s

definition,) parameters for calculating the value of X for each plotted Y value are required. An X Initial

Value and Delta Value are specified for this purpose. The initial value is associated with the Y value for

the first plotted data point and the delta value is used to calculate the value of X for the remaining data

points.

Curve Fit Method. Any of the following curve fit methods can be selected:

• Linear. The plot line for the curve consists of n-1 straight lines consecutively connecting the n

plotted data points.

• Scatter. No plot line is generated. Only the symbols for the plotted data points are displayed.

• Least Squares. A parametric least squares numerical approximation of the best fit is performed,

resulting in a curve consisting of one or more parametric cubic curves (PCs) that pass

consecutively through (or near) the data points. The accuracy of the fit is determined by the user-

specified number of PCs and the number of line segments per PC. Accuracy improves as the

number of PCs and/or the number of line segments per PC are increased.

• Spline. The plot line for the curve consists of n-1 parametric cubic curves (PCs) consecutively

connecting the n plotted data points. The resulting parametric cubic spline does not have to be

monotonic. However, spline equations are often ill-conditioned and rapid changes in direction or

large variations in spacing may produce “kinks” or “loops.” The curve fit accuracy is adjusted by

changing the number of line segments per PC.

All plot parameters except the curve fit method are on the Modify a Curve’s Plot Specifications, 44. The

curve fit method selection is on the Modify a Curve’s Fit Method and Display Attributes, 43. Both of these

subordinate forms are accessed from the XY Plot form when Modify is the selected action and Curve is

the selected object.

15Ch. 1: Overview of the XY Plot ApplicationAxes Scales and Labels

Axes Scales and Labels

The following parameters define how the X and Y axes are scaled and labeled. A separate set of

parameters is provided for each axis.

Scale Method. The selected scale method determines the spacing of the axis primary and secondary tick

marks as linear, logarithmic, or cyclic.

Assignment Method. The assignment method specifies how values at the primary tick marks are

determined. The base point (the value at the first axis origin tick mark) and end point (the value at the

last tick mark on the axis) are either entered by the user or automatically calculated. The base point is the

lower end of the range and the end point is the upper end of the range. The assignment method also

determines the number of primary tick marks as well as the increment between primary tick marks. Any

of the following assignment methods can be selected:

• Automatic (linear scaling)K The user specifies the number of primary tick marks. XY Plot

calculates the base point, end point, and increment from the data point values of posted curves.

• Automatic (logarithmic scaling). XY Plot calculates the base point, end point, and number of

primary tick marks (cycles) from the data point values of posted curves.

• Semi-Automatic (linear scaling). The user specifies the number of primary tick marks, the base

point and the increment. These parameters define the end point.

• Semi-Automatic (logarithmic scaling). The user specifies the number of cycles (primary tick

marks) and the integral power of 10 corresponding to the base point. These parameters also

define the end point.

• Range (linear scaling only). The user specifies the number of primary tick marks and the lower

and upper ends of the range. XY plot calculates the increment.

• Manual (linear scaling only). The user specifies the number of primary tick marks and enters

the value that is to appear at each primary tick mark.

Label Format. The primary tick mark numeric labels can be displayed in either fixed-point, exponential,

integer or power format. The exponential format uses a floating point representation consisting of a

signed mantissa, the radix (base number) of 10, and a signed integral exponent of the base number. The

power format produces labels of the form 10n, where n is a signed integer. The number of significant

digits in the labels is also specified.

The scale method and assignment method parameters are on the Modify Axis Scale Options, 51. Label

format parameters are on the Modify Axis Label Options, 52. Both of these subordinate forms are accessed

from the XY Plot form when Modify is the selected action and Axis is the selected object.

Patran User’s GuidePreparing Curve Data Files

16

Preparing Curve Data Files

This section describes how to prepare curve data files using systems, applications, or editors that are

external to Patran. A curve data file is a formatted ASCII text file containing one or more data sets, each

of which consists of a series of records. Each data set provides the data for one curve.

Data Set Format

A data set is made up of a single header record and one or more data records followed by a termination.

The Header Record contains the curve data type identifier string and (optionally) a character string

defining the curve title, separated by a delimiter. The curve data type identifier must be one of the

following two strings:

• XYDATA indicates that the data records for the data set contain alternating X and Y values.

• YDATA indicates that the data records for the data set contain Y data only.

The Data Records contain the data point values for the curve. These data point values must be listed in

the sequence in which they will be plotted. If the curve data type is XYDATA, the data record(s) must

contain alternating X and Y values (i.e., an X value followed by a Y value) for each data point. If the

curve data type is YDATA, the data record(s) must contain a Y value for each data point. Each X or Y

value must be separated from the next value by a delimiter.

A Data Set is Terminated by one of the following:

• A new header record.

• A termination record containing “END” as the only character string.

• The end of file.

Records

Each record is limited to 80 characters and must be terminated by a new line or carriage return. Data

within a record is entered in free format. If a record contains more than one value or character string, each

value or string must be separated by a delimiter (slash, comma, or space). It is not necessary to

consistently use a particular delimiter within a file, data set, or record. A number of separate values can

fit into a single record as long as they are separated by delimiters and the total number of characters

(including delimiters) does not exceed 80.

17Ch. 1: Overview of the XY Plot ApplicationPreparing Curve Data Files

Format for Data Point Values

Data point values can be specified in any mixture of integer, fixed-point, and floating point formats. The

floating point representation of a number is accomplished by handling the number as a signed mantissa,

multiplied by 10 (the radix) raised to a signed integral exponent. For example:

Example

An example of a curve data file containing two data sets is shown below. The actual file only the Record

Contents column.

-1.23E-2 is the notation that would be used to specify the floating point number -1.23 * 10-2,

where:

-1.23

E

-2

is the mantissa,

signifies that an exponent (to the base 10) follows, and

is the signed exponent.

Record Record Contents Comments

1 XYDATA,CURVE NO.1 Header record for set 1 indicates that this set contains data of

type XY Pairs. The data type identifier is followed by a comma

and the curve title.

2 1/56.3,2/7,3/6.25E-2 First data record for set 1 contains XY values for the first three

data points. Note that the values are a mix of fixed-point,

integer, and floating point format. Note also that slashes are

used to separate the X and Y values of an XY pair, and commas

are used to separate XY pairs.

3 4 The second and third data records for set 1 contain respectively

the X and Y values for the fourth data point. This demonstrates

that X and Y values for the same data point do not need to be in

the same record.

4 7.5

5 YDATA Header record for set 2 terminates set 1, and indicates that set 2

contains data of type Y Data. No curve name is included for set

2, thus the curve name will have to be specified by XY Plot

when set 2 is imported.

6 3,4,5,6,7.9,8.6,10 The data record for set 2 contains the Y values for all 7 data

points in data set 2.

7 END This is the termination record for set 2. This record would not

be necessary here if record number 6 is the last line of the file or

if record number 6 were followed by a header record for another

data set.

Patran User’s GuideNaming Conventions

18

Naming Conventions

Filenames for Curve Data Files

Curve data files must be assigned filenames that conform to UNIX or Windows NT file naming

conventions. The file extension� [\G� is used to identify Patran curve data files.

Names of XY Windows, Curves, and Titles

Names must be assigned to XY windows, curves, and titles at the time they are created. The names of

curves and titles are independent from the title character strings displayed in the XY window where the

curve or title is posted. Initially, a curve name and title are set equal to each other. The curve title may be

modified or the curve may be renamed independently of the other. The same logic applies to title names

and text. The names of XY windows, curves, and titles must conform to the naming conventions in the

table below.

Item Requirements

Uniqueness of Names

Names of each XY window, curve and title must be unique within the name class.

For instance, a curve and a title could both have the same name because they are

in different name classes, but two curves or two titles cannot both have the same

name because they are in the same name class.

Number of Characters

• XY Windows: The number of characters (including any prefixes and suffixes)

may not exceed 31.

• Curves: The number of characters may not exceed 80.

• Titles: The number of characters may not exceed 256.

Legal Characters

• XY Windows: The letters A to Z (upper or lower case), numbers 0 to 9,

underscore, hyphen, and period are legal. Spaces are not allowed.

• Curves and Titles: Any printable character in the ASCII character set is legal.

Case Sensitivity Names are case-sensitive. For example, the names curve_1 and Curve_1 are

evaluated as names of separate and distinct curves. (Try not to have names that

vary only by case.)

19Ch. 1: Overview of the XY Plot ApplicationNotes on Managing XY Plots

Notes on Managing XY Plots

Displaying New Curves

When displaying a new curve for the first time, it is recommended that it be the only curve posted to the

XY window. The following plot specifications and axis option selections are recommended:

Plot Specifications: All data points selected for plotting (Start Point = 1, End Point = highest numbered

data point, Frequency = 1); Least Squares curve fit method selected; Display Symbol option selected.

Axes Scales and Labels: Logarithmic scale method; Automatic assignment method; Display Labels

option selected; Power label format selected.

Axis Tick Marks: Primary display selected.

With these selections, all data points are plotted and a good curve display is produced regardless of plot

range or sharp changes in direction. Adjust the number of PCs and the number of lines per PC for the

desired accuracy. Refer to Modify a Curve’s Fit Method and Display Attributes, 43. After evaluating the

resulting plot, the plot specifications or axis options can be modified as needed to optimize the display.

Effect of Changing the Active Color Table

All color selections for XY Plot objects are determined by the active color table selected on the Color

Configurations form accessed through the Display menu. Changing the active color table will change all

XY Plot color selections.

Background Colors

The background color of the XY window is always the first color in the active color table. The first color

is black if the Patran standard color table is selected. Any background color may be selected for the graph

area (see page 19) and legend box (see page 58). Be sure that the colors selected for display objects (e.g.,

window titles, legend titles, curve names, axis titles, labels, borders, axis lines, tick marks, gridlines,

curve plot lines, and data point symbols) are different from the background colors of the areas where

these objects are displayed.

If you intend to produce black and white hardcopy printouts of XY windows, select the background

colors to achieve the best contrast between the printed background and the various objects displayed.

Refer to the section on File>Print (p. 217) in the Patran Reference Manual for more information.

Using Colors, Line Styles, and Data Point Symbol Types to Visually Distinguish Curves

When two or more curves are posted to the same XY window, visual distinction among them (both in the

legend and in the graph area) is necessary. This is accomplished by selecting a different plot line color,

line style and/or a different data point symbol color or type for each curve. See Modify a Curve’s Fit

Patran User’s GuideNotes on Managing XY Plots

20

Method and Display Attributes, 43. With up to fifteen colors (not including background colors,) seven line

styles, and fourteen symbol types, visual distinction can be maintained among a large number of curves

posted to the same window.

Locating Titles and Legend Boxes

The location of titles and legend boxes are specified by X,Y locations relative to the upper left corner of

the XY window. The locations are specified as percentages of the X and Y dimensions of the XY window.

For example, if an X,Y location of 10, 10 (i.e., 10% of the X and Y dimensions of the window) is

specified and the XY window has dimensions of 6 x 6 inches, the actual location would be 6 inches

vertically and horizontally from the upper left corner of the window.

For legend boxes, the X,Y location defines the location of the upper left corner of the legend box relative

to the upper left corner of the window. See Modify Legend Display Attributes, 58. Since the height and

width of the legend box are specified as percentages of the X and Y dimensions of the XY window, care

must be taken to assure that the specified X,Y location will permit the entire legend box to fit inside the

XY window without intruding into the graph area or posted titles.

For titles, the X,Y location defines the location of the top of the first character of the title relative to the

upper left corner of the window. See Modify a Title, 46. Care must be taken to assure that the specified

X,Y location will permit the entire title string to fit inside the XY window without intruding into the

legend box or the graph area.

Multi-Line Titles

Each defined title is limited to a single line with a maximum of 256 characters. If a multi-line title is

required, create two or more title definitions and locate each title line as described above.

Ch. 2: XY Plot Forms Patran Reference Guide

2 XY Plot Forms

� Overview of XY Plot Actions 22

� Create Actions 23

� Post Actions 33

� Modify Actions 39

� Rename Actions 60

� Delete Actions 64

Patran Reference GuideOverview of XY Plot Actions

22

Overview of XY Plot Actions

Each action/object combination listed below defines a separate option on the XY Plot application form.

Options that require subordinate forms are also indicated and separately described.

Action Object Options

Create • XY Window

• Curve • Import Curve Data from File.

• Type New Curve Data into Spreadsheet.

• Title

Post • XY Window

• Curve

• Title

Modify • XY Window

• Curve • Modify Curve Title.

• Modify Curve Display Options.

• Edit Curve Data in Spreadsheet.

• Read Curve Data from File.

• Modify Data Attributes.

• Title

• Axis • Modify Axis Line Display Options.

• Modify Axis Scaling.

• Modify Axis Numeric Labels.

• Modify Axis Titles.

• Modify Tick Marks.

• Modify Gridlines.

• Legend

Rename • XY Window

• Curve

• Title

Delete • XY Window

• Curve

• Title

23Ch. 2: XY Plot FormsCreate Actions

Create Actions

Create a New XY Window

Creates a new XY window. The newly created window is automatically made the current XY window.

Action Create

Object XY Window

Existing XY Windows Lists the names of existing XY windows.

Enter XY Window Name

Enter a name for the new XY window. See Naming Conventions, 18 for

more help.

Patran Reference GuideCreate Actions

24

Create a New Curve

Creates a new curve definition, including curve name, data points, and plot color.


Import Curve Data from an External File

This form appears when either the File or the Data from File button is selected on XY Plot form, when

Create or Modify is the selected action, and Curve is the selected object. This form is used to import an

Action Create

Object Curve

Existing Curves Lists the names of existing curves.

Curve Name Enter a name for the new curve. This name will also be used initially as the

curve title. See Naming Conventions, 18 for more help.

Color Shows the current curve color. Click this button to display a color bar to

choose a curve color.

Curve Data Input Note: The File and Keyboard options are not available until a curve name

has been created.

File Displays the Curve Data File subordinate form to import data points from

a file for the new curve. If a curve title is specified in the file, the title will

be used for the new curve title.

Keyboard Displays the Curve Data Keyboard subordinate form to enter data points

for the new curve.


26

external ASCII curve data file containing data points and an optional title. Curve data files may contain

multiple sets of data; each for a different curve. See Preparing Curve Data Files, 16 for more help.

Set Number Displays the number of the data set to read from the external file.

Filter Enter a filter specification for the curve data files, or accept the default. The

default filter specification is *.xyd, which is the standard filename extension

used to identify curve data files. If the default filter is applied, all .xyd files in

the selected directory are listed. If the default filter has been modified, click the

Filter button below to apply the change.

Directories Lists existing directories. Select a directory from the list, then click the Filter

button to update the Curve Data File listbox above.

Curve Data File Lists the names of the existing files in the selected directory that pass the filter

criteria. Click on a data file in the listbox to select it and it will appear in the

Read From File databox below.

Read from File Displays the name of the selected file whose specified set number is to be read

as data points for the curve. You can also manually enter a file name in the

databox; however, the full pathname must be included.

Read Reads the specified set number from the curve data file listed in the Read from

File databox.


Create/Modify/Display a Curve’s Data Points

This form appears when either the Keyboard or the Data from Keyboard button is selected on XY Plot

form, when Create or Modify is the selected action and Curve is the selected object. Data point values

for the curve are entered into the spreadsheet on this form and the values may be written to an external

file.

Data Type Defines the type of data points used in the spreadsheet below. For XY Pairs, the

values in both the X and Y columns of the spreadsheet are used. For Y Data,

only the data in the Y column is used.

Number of Points Displays the total number=of data points defined in the spreadsheet. When the

Apply action is taken, data points for which no input data was entered are

defaulted to a value of 0.

Start Point Displays the number of the first data point to be entered in the spreadsheet.


28

Input Point Data `êÉ~íÉ=çê=ãçÇáÑó=Ç~í~=éçáåíë in the spreadsheet as follows:

1. Click on a cell in the spreadsheet to select it. Alternatively, select the X

or Y column or row header to select all cells in the column or row.

2. Click in the Input Point Data databox and enter a value. (Data values

must be signed integer or fixed point numbers.)

3. Press the Return key on the keyboard. The value appears in the selected

cell(s).

Note: The maximum number of points displayed in the spreadsheet is 50. When

a curve has more than 50 data points, select which points to display by

modifying the Start Point value in this form.

Write XY Data to File

Select this option to export the entered data points to a file. When the Apply

button is selected, the Write Curve Data File form appears.

Apply Updates the curve’s data points to the values contained in the spreadsheet.


Write Curve Data to a Curve Data File

This subordinate form appears when the Write XY Data to File option is selected on the Curve Data

Keyboard form. This form allows you to export curve data from the spreadsheet in the Curve Data

Keyboard form to a new or existing external curve data file.

XY Data Title Enter the name, or accept the default, of the curve whose data is to be written to

a curve data file. The default curve name is the selected curve title.

Filter Enter a filter specification for the curve data files, or accept the default. The

default filter specification is *.xyd, which is the standard filename extension

used to identify curve data files. If the default filter is applied, all .xyd files in

the selected directory are listed. If you modify the default filter, click the Filter

button below to apply the change.

Directories Lists existing directories. Select a directory from the list, then click the Filter

button to update the Data File listbox above.

Data Files Lists the names of the existing files in the selected directory that pass the filter

criteria. Click on a data file in the listbox to select it and it will appear in the

Write to File databox below.

têáíÉ=`ìêîÉ=a~í~=cáäÉ=

Filter

directory_1*.xyd

directory_2

directory_3

directory_4

Directories

Write to File

Data Files

directory_1/file_1.xyd

OK Filter Cancel

2.xyd

3.xyd

4.xyd

111.xyd directory_1

Curve One

XY Data Title


30

Write to File Displays the name of the selected file into which the curve data will be written.

You can also manually enter a file name in the databox; however, the full

pathname must be included.

Caution: If an existing file name is entered in the Write to File databox, its

curve data will be overwritten by the new curve data.

OK Writes the curve data into the specified file listed in the Write to File databox.


Create a New Title

Creates a new title definition, including the title text, location, displayed color, and the font size.


32

Action Create

Object Title

Existing Titles Lists the names of existing titles.

Title Enter the title text. The title name will initially be used as the title text. See

Naming Conventions, 18 for more help.

X/Y Location Adjust slidebars to change the horizontal (X) or vertical (Y) location (as a

percentage of the distance from the top left corner of the XY window) where the

first character of the title will appear. See Locating Titles and Legend Boxes, 20

for more help.

Color Shows the current title text color. Click this button to display a color bar to

choose a title text color.

Font Size Pull down the Font Size menu to select a font size for the title text. Options are

8, 10, 12, 14, 18, and 24 point.

Apply Applies current settings.

33Ch. 2: XY Plot FormsPost Actions

Post Actions

Post/Unpost XY Windows, and Select Current XY Window

Posts or unposts a selected XY window.

Patran Reference GuidePost Actions

34

Action Post

Object XY Window

Select Current XY Window

Lists the names of existing XY windows, with the current XY window selected.

Click on a window name from the list to make it the current XY window.

Post/Unpost XY Windows

Lists the names of existing XY windows, with the posted windows selected.=

Select a window name from the list to post or unpost.



Post/Unpost Curves in Current XY Window

Posts or unposts a curve in the current XY window.


36

Action Post

Object Curve



Click on a window name from the list to make it the current XY window to

which curves can be posted or unposted.

Post/Unpost Curves

Lists the names of existing curves, with the posted curves selected.=Select a

curve name from the list to post or unpost in the current XY window.



Post/Unpost Titles in Current XY Window

Posts or unposts a title in the current XY window.


38

Action Post

Object Title



Click on a window name from the list to make it the current XY window to

which titles can be posted/unposted.

Post/Unpost Titles Lists the names of existing titles, with the posted titles selected.=Select a title

from the list to post or unpost in the current XY window.

39Ch. 2: XY Plot FormsModify Actions

Modify Actions

Modify Graph Area Options for Current XY Window

Show or modify the display options for the graph area in the current XY window, including the

background color, the border line style, color, and thickness.

Patran Reference GuideModify Actions

40

Action Modify

Object XY Window


Lists the names of existing XY windows, with the current XY window

selected. Click on a window name from the list to make it the current XY

window to which graph area options may be modified.

Graph Area

Display Border Select this option to display a border around the graph area.

Line Style Pull down the Line Style menu to select the graph area border linestyle.

Options are Solid, Dotted, Dot-Dash, Short Dash, Long Dash and Odd Dash.

Border Color

Background Color

Shows the current border and background color. Click this button to display a

color bar to choose a border and/or background color.

Border Thickness Adjust the slidebar to set the thickness of the graph area border, 1 to 50.

Apply Applies the current settings.

Reset Restores the graph area options for the current XY window to the previous

setting.


Modify a Defined Curve

Show/modify the definition of a selected curve, including the curve’s title, display options, plot

specifications, and data points.

Action Modify

Object Curve


42

Modify a Curve’s Title

This subordinate form appears when the Title button is selected on the XY Plot form when Modify is the

selected action and Curve is the selected object. Use this form to change the selected curve’s title and text

color. The curve’s title and color are displayed in the Legend box of an XY window where it is posted.

Curve List Lists the names of existing curves. Select a curve name from the list to modify.

Title Displays the Curve Name subordinate form to modify the title text and color.

Options Displays the Curve Options subordinate form to modify the curve’s attributes.

Data from Keyboard

Displays the Curve Data Keyboard subordinate form to modify the curve’s data

points.

Data from File Displays the Curve Data File subordinate form to import data points from a

curve data file.

Data Attributes Displays the Data Attributes subordinate form to modify the curve’s plot

specifications.

Curve Title Text Shows the curve title that will be displayed in the Legend box. Enter a new

name, if desired.

Color Shows the current curve name color displayed in the Legend box. Click this

button to display a color bar to choose a curve name color.


Modify a Curve’s Fit Method and Display Attributes

This subordinate form appears when the Options button is selected on the XY Plot form when Modify is

the selected action and Curve is the selected object. Use this form to select the curve fit method and

display attributes.

Curve Fit

Method Pull down this menu to select a curve fit method. Options are: Linear, Scatter,

Least Squares, and Spline. See Plot Specifications for Curves, 14 for more help.

Lines Per PC/

# PCs

When the Least Squares or Spline method is selected, adjust the appropriate

slidebar to specify the number of line segments generated per parametric cubic

curve or the number of parametric cubic curves that will be generated.

Symbols


44

Modify a Curve’s Plot Specifications

This subordinate form appears when the Data Attributes button is selected on the XY Plot form when

Modify is the selected action and Curve is the selected object. Use this form to define or modify the

curve’s plot specifications. The last two databoxes (X Initial Value and X Delta) are only used when the

Display Symbol Select this option to display symbols at plotted data points.

Type Pull down the Type menu to select a new curve symbol. Options are: Letter X,

Plus (+) symbol, Circle (filled/unfilled), Square (filled/unfilled) Triangle

(filled/unfilled), Diamond (filled/unfilled), Arrowhead (filled/unfilled), and

Hexagon (filled/unfilled).

Color Shows the current symbol color. Click this button to display a color bar to

choose a symbol color.

Symbol Size Adjust the slidebar to set the size of the selected data point symbol.

Curve Style

Line Style Pull down the Line Style menu to select a curve line style. Options are: Solid,

Dotted, Dot Dash, Short Dash, Long Dash, and Odd Dash.

Color Shows the current curve color. Click this button to display a color bar to choose

a curve color.

Line Thickness Adjust the slidebar to set the line thickness of the displayed curve.


curve’s data type is Y data (i.e., each data point has a Y value, but no X value). See Plot Specifications

for Curves, 14 for more help.

Start Point/End Point

Specify an integer defining the number of the first and last data point to be plotted.

X Scale Factor/Y Scale Factor

Specify a multiplier to be applied to data point values in the X and Y columns.

Multipliers may be signed integer or fixed-point numbers.

Frequency Specify an integer (n) that defines the interval between plotted data points. For

example, If n = 1, all data points from the start point to the end point are plotted.

If n > 1, every nth data point is plotted.

X Initial Value When the curve’s data points only have Y values, specify the initial X value to be

associated with the Y value at the start point. The X value may be a signed integer

or fixed-point number.

X Delta When the curve’s data points only have Y values, specify the incremental X value

to be added to the X value for the preceding plotted data point to obtain the X value

for the next plotted data point. The X delta value may be a signed integer or fixed-

point number.


46

Modify a Title

Show/modify the definition of a selected title, including the title text, location, font size, and color.


Action Modify

Object Title

Title List Lists the names of existing titles. Select a title from the list to modify.

Title Text Displays the current title text to modify if desired. See Naming Conventions, 18 for

more help.

X Location/Y Location

Adjust the slidebars to change the horizontal (X) or vertical (Y) location (as a


first character of the title will appear. See Locating Titles and Legend Boxes, 20 for

more help.

Font Size Pull down the Font Size menu to select font size for the title. Options are 8, 10, 12,

14, 18, and 24 point.

Color Displays the current title color. Click this button to display a color bar to choose a

title color.


48

Modify Axis Option

Show/Modify the options for axes in the current XY window, including the axis lines, scale, labels, titles,

tick marks, and gridlines.


Action Modify

Object Axis


Lists the names of existing XY windows, with the current window selected. Select

a window name from the list to modify.

Active Axis Select the appropriate axis or axes to modify.

Options Displays the Axis Options subordinate form to modify the axis display attributes.

Scale Displays the Axis Scale subordinate form to modify the axis scale.

Labels Displays the Axis Labels subordinate form to modify the axis labels.

Title Displays the Axis Title subordinate form to modify the axis title.

Tick Marks Displays the Tick Marks subordinate form to modify the axis tick mark

specifications.

Gridlines Displays the Gridlines subordinate form to modify the axis gridline options.


50

Modify Axis Line Display Attributes

This subordinate form appears when the Options button is selected on the XY Plot form when Modify is

the selected action and Axis is the selected object. Use this form to modify the display options for the

active axis line.

Display Top/Bottom

Specify the side(s) on which the active axis is displayed (top/bottom for X axis,

left/right for Y axis).

Line Style Pull down the Line Style menu to select an axis line style. Options are: Solid,


Color Shows the current axis line color. Click this button to display a color bar to choose

a line color.

Line Thickness Adjust the slidebar to set the thickness of the axis line.


Modify Axis Scale Options

This form appears when the Scale button is selected on the XY Plot form when Modify is the selected

action and Axis is the selected object. Use this form to modify the active axis scale. See Axes Scales and

Labels, 15 for more help.

Scale Select type of scale to be used. Depending on the type of scale chosen, different

assignment methods are available to select, which are described below.

Assignment Method

Depending on the assignment method chosen, either arbitrary values, a base value

and an increment, or a min-max range can be entered so that tick mark values are

automatically calculated and applied to the axis scale.

• Automatic (linear scale). Enter the number of primary tick marks. The base

value, min-max range, and increment between primary tick marks is

automatically calculated from the curve data.

• Automatic (logarithmic). All values are automatically calculated from the

curve data.

• Semi-Automatic (linear scale). Enter a base value and increment, and the

number of primary tick marks. The min-max range will be automatically

calculated.


52

Modify Axis Label Options

This subordinate form appears when the Labels button is selected on the XY Plot form when Modify is

the selected action and Axis is the selected object. Use this form to modify the format, number of

• Semi-Automatic (logarithmic scale). Enter a base power of ten value and the

number of cycles. The min-max range is calculated automatically.

• Manual (linear scale only). Enter the number of primary tick marks which will

determine the number of values (signed integer or fixed-point numbers) to be

entered.

• Range (linear scale only). Enter the lower and upper values and the number of

primary tick marks. The increment between tick marks is automatically

calculated.

Enter Lower and Upper Values

See Assignment Method, above.

Number of Primary Tick Marks

See Assignment Method, above.


significant digits, and color of the active axis numeric labels generated at each primary tick mark. For

more help, see Axes Scales and Labels, 15.

Display Labels Select this option to display numeric labels at each primary tick mark on the

selected axis.

Label Format Select the format for the axis labels. (The Power option is available only when

Logarithmic scale is selected on the Axis Scale form.)

Color Shows the current axis label color. Click this button to display a color bar to choose

a label color.

# Significant Digits

Enter the number of significant digits in axis label (does not apply to the Power=

format).

^ñáë=i~ÄÉäë=


54

Modify Axis Title

This subordinate form appears when the Title button is selected on the XY Plot form when Modify is the

selected action and Axis is the selected object. Use this form to modify an axis title text and display

attributes, including font color and size.

Display Axis Title

Select this option to display an axis title.

Axis Title Displays the current axis title text to modify if desired.

Font Size Pull down the Font Size menu to select the axis title font size. Options are 8, 10,

12, 14, 18, and 24 point.

Color Shows the current axis title color. Click this button to display a color bar to choose

a text color.


Modify Axis Tick Mark Display Attributes

This form appears when the Tick Marks button is selected on the XY Plot form when Modify is the

selected action and Axis is the selected object. Use this form to modify the display attributes for primary

and secondary axis tick marks.

Display Select the tick marks to display, either Primary or Secondary.

Options Select the tick marks to modify the display options, either Primary, Secondary, or

Both.

Location Specify whether selected tick marks are to appear outside or inside the graph area.

Color Shows the current tick mark color. Click this button to display a color bar to choose

a color.


56

Modify Axis Gridline Display Attributes

This form appears when the Gridlines button is selected on the XY Plot form when Modify is the selected

action and Axis is the selected object. Use this form to modify the display attributes for primary and

secondary axis gridlines.

Line Thickness Adjust the slidebar to set the thickness of the tick mark lines.

# Sec. Tick Marks

Adjust the slidebar to set the number of secondary tick marks to appear between

each primary tick mark. When logarithmic scale=has been selected on the Axis

Scale form, this slidebar has no effect and the number of secondary tick marks are

set to=8.

Display Select the gridlines for display, either Primary or Secondary.

Options Select the gridlines to modify the display options, either Primary, Secondary, or

Both.

Line Style Pull down the Line Style menu to select the gridline line style. Options are Solid,



Color Shows the current gridline color. Click this button to display a color bar to choose

a color.

Line Thickness Adjust the slidebar to set the thickness of the selected gridlines.


58

Modify Legend Display Attributes

Show/modify options for displaying the Legend for the current XY window.

Action Modify

Object Legend



Click on an XY window name to select it as the current XY window whose legend

is to be modified.


Display Select the legend elements to be displayed.

Attributes Adjust the slidebars to change the horizontal (X) and vertical (Y) locations (as a


top edge of the legend box will appear.

Background Color

Shows the current color for the legend background. Click this button to display a

color bar to choose a background color.

Title - Text Enter the title text to appear in the legend box.

Text Color / Border Color

Shows the current color for the legend text and border. Click the appropriate button

to display a color bar to choose a text or border color.

Border - Line Style

Pull down the Line Style menu to select the legend border linestyle. Options are:

Solid, Dotted, Dot-ash, Short Dash, Long Dash, and Odd Dash.

Patran Reference GuideRename Actions

60

Rename Actions

Rename an XY Window

Renames a selected XY window.

Action Rename

Object XYWindow

61Ch. 2: XY Plot FormsRename Actions

XY Window List

Lists the names of existing XY windows. Click on an XY window to rename.

Rename as Enter a new name for the XY window. See Naming Conventions, 18 for more help.

Patran Reference GuideRename Actions

62

Rename a Curve

Renames a selected curve.

Action Rename

Object Curve

Curve List Lists the names of existing curves. Click on a curve to rename.

Rename as Enter a new name for the curve. See Naming Conventions, 18 for more help.

63Ch. 2: XY Plot FormsRename Actions

Rename a Title

Renames a selected title.

Action Rename

Object Title

Title List Lists the names of existing titles. Click on a title to rename.

Rename as Enter the new name for the title. See Naming Conventions, 18 for more help.

Patran Reference GuideDelete Actions

64

Delete Actions

Delete an XY Window

Deletes a selected XY window.

Action Delete

Object XY Window

XY Window List

Lists the names of existing XY windows. Click on an XY window to delete.

65Ch. 2: XY Plot FormsDelete Actions

Delete a Curve

Deletes a selected curve.

Action Delete

Object Curve

Curve List Lists the names of existing curves. Click on a curve name to delete.

Patran Reference GuideDelete Actions

66

Delete a Title

Deletes a selected title.

Action Delete

Object Title

Curve List Lists the names of existing titles. Click on a title to delete.

jp`Kjîáëáçå=_ìáäÇÉê=~åÇ=bî~äì~íçê=OMMO=fåëí~ää~íáçå=dìáÇÉ

I n dex


I n d e x

I n d e xI N D E XI n d e x

Index

Aaxes, 6

axis label, 44

axis scale, 44

axis title, 44

Ccreate

curve, 24

title, 30

XY window, 23

curve, 6, 25

curve data, 26, 28

curve title, 37

Ddata attributes, 39

delete

curve, 57

title, 58

XY window, 56

display attributes, 38, 44, 49, 50, 51

Eexternal file, 25

Ggraph area, 35

gridline, 3, 44

Hh3, 6

Lleast squares, 38

legend, 6

line style, 39

line thickness, 39

Mmodify, 35

axis, 43, 44

axis gridline, 50

axis label, 46

axis scale, 45

axis tick mark, 49

axis title, 48

curve, 36, 39

curve fit method, 38

curve title, 37

graph area, 35

legend, 51

title, 41

Ppost/unpost curves, 33

post/unpost titles, 34

post/unpost XY windows, 32

Rrename

curve, 54

title, 55

XY window, 53

Sscatter, 38

spline, 38

Ttick mark, 3, 44, 49


68

XXY

axes, 3

curve, 3

legend, 3

plot, 3

title, 3

window, 3, 53

windows, 6

Documents

Patran 2008 r1 Reference Manual Part 7: XY Plotting