var-ddof ( seq n -- x ) (original) (raw)

var-ddof ( seq n -- x )
Statistics

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Vocabulary
math.statistics

Inputs

seq an object
n an object

Outputs

x an object

See also
population-var, sample-var

Definition

USING: kernel math sequences ;

IN: math.statistics

: var-ddof ( seq n -- x )
2dup [ length ] dip - 0 <=
[ 2drop 0 ]
[ [ [ sum-of-squared-errors ] [ length ] bi ] dip - / ] if ;
inline