sample-std ( seq -- x )
Statistics

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Vocabulary
math.statistics

Inputs

seq	a sequence

Outputs

x	a non-negative real number

Word description
Computes the sample standard deviation of seq, which is the square root of the sample variance. It measures how widely spread the values in a sequence are about the mean for a random subset of a dataset.

Examples

USING: math.statistics prettyprint ; { 7 8 9 } sample-std .
1.0

See also
std-ddof, population-std

Definition

IN: math.statistics

: sample-std ( seq -- x ) 1 std-ddof ; inline