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