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math.statistics: use "cumulative map" as base of all cumulative words.

db4
John Benediktsson 2012-09-25 22:27:42 -07:00
parent a283782abe
commit ca69afec31
1 changed files with 7 additions and 4 deletions
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basis/math/statistics/statistics.factor
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@ -318,17 +318,20 @@ ALIAS: ste sample-ste
ALIAS: corr sample-corr
: cum-map ( seq identity quot -- seq' )
swapd [ dup ] compose map nip ; inline
: cum-sum ( seq -- seq' )
0 swap [ + dup ] map nip ;
0 [ + ] cum-map ;
: cum-product ( seq -- seq' )
1 swap [ * dup ] map nip ;
1 [ * ] cum-map ;
: cum-min ( seq -- seq' )
[ ?first ] keep [ min dup ] map nip ;
dup ?first [ min ] cum-map ;
: cum-max ( seq -- seq' )
[ ?first ] keep [ max dup ] map nip ;
dup ?first [ max ] cum-map ;
: probabilities ( seq -- probabilities )
[ histogram values ] [ length ] bi v/n ;