# Stdev - script function Stdev() returns the standard deviation of the values given by the expression over a number of records as defined by a group by clause. Syntax: Stdev([distinct] expr) Return data type: numeric Arguments: Stdev arguments | Argument | Description | | --- | --- | | expr | The expression or field containing the data to be measured. | | distinct | If the word distinct
occurs before the expression, all duplicates will be disregarded. | Examples and results: Add the example script to your app and run it. Then build a straight table with ` Type `and `MyStdev` as dimensions. Examples and results | Example | Result | | --- | --- | | `Table1:`
`crosstable LOAD recno() as ID, * inline [`
`Observation\|Comparison`
`35\|2`
`40\|27`
`12\|38`
`15\|31`
`21\|1`
`14\|19`
`46\|1`
`10\|34`
`28\|3`
`48\|1`
`16\|2`
`30\|3`
`32\|2`
`48\|1`
`31\|2`
`22\|1`
`12\|3`
`39\|29`
`19\|37`
`25\|2 ] (delimiter is '\|');` `Stdev1:``LOAD Type,`` Stdev(Value) as MyStdev ``Resident Table1 Group By Type;` | The results of the Stdev() calculation are:

|