© HRS Ltd, 2002. In NZ phone 0800 477 776, A 6-minute slide show to illustrate the main features of Mathcad documents are used for engineering

© HRS Ltd, 2002. In NZ phone 0800 477 776, www.hrs.co.nz

A 6-minute slide show to illustrate the

main features of

Mathcad documents are used forengineering and financial mathematics

calculations.They are intuitive, easily audited and portable.

If what you see here looks like a better way to do your job,contact HRS today.

click here to begin


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Mathcad allows you to document your calculations and easily check them

Here is a screen picture of a very simple Mathcad document


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Text is placed anywhere on the page


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You can define named mathematical variables


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New variables can be based on any mathematical expression of existing variables


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If you type the name of an existing variable, followed by the = sign, Mathcad gives you the present value of that variable


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If you then change any variable that is used to define other variables, the values of the other variables are automatically updated


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Mathcad allows you to incorporate spreadsheets

Here we do it to show how much harder to read a spreadsheet is than Mathcad

When you double click on the embedded spreadsheet, you can activate it in Mathcad


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Here is the value of z

And here is the expression you need to interpret!

Which do you prefer?


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Electrical calculations often use complex numbers

Sometimes you need exact answers

This is easier to calculate in a microprocessor


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side r( ) area r( )

area r( ) r2

area 33.27 cm( ) 0.348 m2

side 2.2 m( ) 3.899 m

Define your own area function

Now use it with a value of r -including units, if you want

Functions can use other functions

Very often you will use Mathcad’’s own built-in functions, that cover many areas of calculation


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Mathcad allows the use of units in its calculations, using the abbreviations you are used to. It will automatically take care of unit conversions and output its results in SI units.

Set the values of variables

M 1000 kg

V 60 mph

KE1

2M V2

KE 3.597 105 J

Define an expression

When you show the result, Mathcad knows this is an energy, and shows it in Joules

Double click the units place-holder to change the units, if necessary


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Insert a data entry type Excel component

The data in the spreadsheet is stored in a matrix called M

Choose a 3D graph type

Type M to connect the data with the graph


Getting specific data from Excel

Choose an Excel component from here

Say where the data is

See the Excel data within Mathcad

Tell Mathcad names you want for the vectors

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Choose a 2D Scatter Plot

Replace the place-holders by the Year and Count variables

You can plot your data, easily


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Here we solve a system of nonlinear equations numerically.

We'll give the solver guesses for the variables to start the process:

x 1y 1

Given

x3 sin y( ) 25

y2 cos x( ) 27

Find x y( )2.96

5.101

“Given” and “Find” work in pairsThese equations set allowable values of x and y

The Find expression gives values of x and y that fit the conditions


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g x( )0

x

tsin t( )3 e t

d * g 100( ) 0.3

When you do integrations, the method appropriate for the expression must be chosen.

Sometimes, an equation can be simplified before it is evaluated - this gives you greater speed and more precision. The Optimise option tells Mathcad to try this.

I right clicked on the integral sign to show the options - Mathcad has chosen an adaptive algorithm.

In this case, the integration can be performed by evaluating this numeric expression.


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To designate a set of commands as a program, you use the program line tool

The assigned variable takes the value of the last assignment on the program line


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You can highlight, lock and encrypt your key statements, so your documents are secure

Select part of your document, and choose Insert/Area

Set the properties of the area

Choose whether to lock and/or collapse it


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You might think this is a lot to learn. Mathcad is powerful, but it is also intuitive, and comes with many web-based and built-in resources to get you started.

You can buy additional Mathcad documents and program extensions,

to give you easy access to the world’s knowledge in signal processing,

image processing, mechanical design and many other areas


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Training

As with any program, the quickest, easiest, and in the

long run cheapest way to learn is to pay a professional trainer to teach you and your staff.

HRS has a schedule of open-to-everyone beginner’s Mathcad courses and also runs customised in-house training courses.

Contact us for details.


Thank you for taking the time to watch this presentation

Mathcad is sold in several versions and with different licensing options.

For details on these please contact your dealer.In New Zealand this is

HRS LtdNew Zealand’s Technical Software Source

Tel: 0800 477 776 or Email: [email protected] other countries please go to

www.mathsoft.com

Documents

© HRS Ltd, 2002. In NZ phone 0800 477 776, A 6-minute slide show to illustrate the main features of Mathcad documents are used for engineering