math.similarity: fix tests, not sure this is the correct definition.

2012-05-08 08:05:31 -07:00 · 2012-05-08 08:05:31 -07:00 · bab0f663ae
parent b7ae7171f1
commit bab0f663ae
1 changed files with 1 additions and 1 deletions
--- a/extra/math/similarity/similarity.factor
+++ b/extra/math/similarity/similarity.factor
@ -9,7 +9,7 @@ IN: math.similarity
    v- norm 1 + recip ;

 : pearson-similarity ( a b -- n )
-    over length 3 < [ 2drop 1.0 ] [ corr 0.5 * 0.5 + ] if ;
+    over length 3 < [ 2drop 1.0 ] [ full-corr 0.5 * 0.5 + ] if ;

 : cosine-similarity ( a b -- n )
    [ v* sum ] [ [ norm ] bi@ * ] 2bi / 0.5 * 0.5 + ;