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machine-learning: Add stratified-samples for getting multiple samples.

db4
Doug Coleman 2012-11-28 09:13:16 -08:00
parent 516549b52c
commit fa2d49dd44
1 changed files with 3 additions and 0 deletions
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extra/machine-learning/rebalancing/rebalancing.factor
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@ -22,6 +22,9 @@ MEMO: probabilities-seq ( seq -- seq' )
: stratified-sample ( stratified-sequences probability-sequence -- elt )
probabilities-quot call swap nth random ; inline
: stratified-samples ( stratified-sequences probability-sequence n -- elt )
[ '[ _ _ stratified-sample ] ] dip swap replicate ;
: equal-stratified-sample ( stratified-sequences -- elt )
random random ; inline