Upload
dora-ramsey
View
221
Download
0
Tags:
Embed Size (px)
Citation preview
ATTRIBUTE TABLEOptions: add field
Type
Short integer± 32’768
Long integer ± 2’147’483’648
Float ca. ± 2^38
Doubleca. ± 2^308
Textalphanumeric
Datemm/dd/yyyy hh:mm:ss
ATTRIBUTE TABLEOptions:
add field
Precision(number of digits)
Scale(number of digits after the decimal point)
(Only numbers)
Data Types
• Text (alphanumeric)• Number
– Nominal (e.g. a postal code)– Ordinal (e.g. order of alluval terrace)– Cardinal
• With conventional zero (e.g. temperature)• With real zero (e.g. precipitation)
Text and nominal and ordinal numbers can only be sorted
No statistic evaluation (such as central values or dispersion
parameters) is allowed, except for the evaluation of the modal class
Cardinal numbers with real zero can be submitted to full statistic analyses
Cardinal numbers with conventional zero don’t allow ratios
(e.g. 20°C is not the double of 10°C)
ATTRIBUTE TABLEMultiple field editing
Editing one fieldfor all the selectedrecords
Field calculator
Simply type in the new value/label
Text must be placed between quatation marks
ATTRIBUTE TABLEMultiple field editing
Editing one fieldfor all the selectedrecords
Field calculator
Run the calculator