cum-sum0 ( seq -- seq' )
Statistics » Computing cumulative sequences

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Vocabulary
math.statistics

Inputs

seq	a sequence

Outputs

seq'	a sequence

Word description
Returns the cumulative sum of seq starting with 0 and not including the whole sum.

Examples

USING: math.statistics prettyprint ; { 1 -1 2 -1 4 } cum-sum0 .
{ 0 1 0 2 1 }

Definition

USING: kernel math sequences ;

IN: math.statistics

: cum-sum0 ( seq -- seq' ) 0 [ + ] accumulate nip ;