current-std ( standard-deviator -- std )


Vocabulary
rosetta-code.standard-deviation

Inputs
standard-deviatoran object


Outputs
stdan object


Definition
USING: accessors kernel math math.functions ;

IN: rosetta-code.standard-deviation

: current-std ( standard-deviator -- std )
[ [ sum^2>> ] [ n>> ] bi / ] [ [ sum>> ] [ n>> ] bi / sq ]
bi - sqrt ;