STDDEV

The STDDEV function computes the standard deviation of an n -element vector.

Calling sequence

Result = STDDEV( X )

Arguments

X

A numeric vector.

Keywords

DOUBLE

If this keyword is set, computations are performed in double precision arithmetic.

NAN

Set this keyword to cause the routine to check for occurrences of the IEEE floating-point value NaN in the input data. Elements with the value NaN are treated as missing data. (See Special Floating-Point Values for more information on IEEE floating-point values.)

Example

x = [65, 63, 67, 64, 68, 62, 70, 66, 68, 67, 69, 71, 66, 65, 70]
; ; Define the n-element vector of sample data.

result = STDDEV(x); ; Compute the standard deviation.

IDL prints:

8.16292