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Diffstat (limited to 'python/cdec/sa/features.py')
-rw-r--r-- | python/cdec/sa/features.py | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/python/cdec/sa/features.py b/python/cdec/sa/features.py deleted file mode 100644 index 325b9e13..00000000 --- a/python/cdec/sa/features.py +++ /dev/null @@ -1,57 +0,0 @@ -from __future__ import division -import math - -MAXSCORE = 99 - -def EgivenF(fphrase, ephrase, paircount, fcount, fsample_count): # p(e|f) - return -math.log10(paircount/fcount) - -def CountEF(fphrase, ephrase, paircount, fcount, fsample_count): - return math.log10(1 + paircount) - -def SampleCountF(fphrase, ephrase, paircount, fcount, fsample_count): - return math.log10(1 + fsample_count) - -def EgivenFCoherent(fphrase, ephrase, paircount, fcount, fsample_count): - prob = paircount/fsample_count - return -math.log10(prob) if prob > 0 else MAXSCORE - -def CoherenceProb(fphrase, ephrase, paircount, fcount, fsample_count): - return -math.log10(fcount/fsample_count) - -def MaxLexEgivenF(ttable): - def feature(fphrase, ephrase, paircount, fcount, fsample_count): - fwords = fphrase.words - fwords.append('NULL') - def score(): - for e in ephrase.words: - maxScore = max(ttable.get_score(f, e, 0) for f in fwords) - yield -math.log10(maxScore) if maxScore > 0 else MAXSCORE - return sum(score()) - return feature - -def MaxLexFgivenE(ttable): - def feature(fphrase, ephrase, paircount, fcount, fsample_count): - ewords = ephrase.words - ewords.append('NULL') - def score(): - for f in fphrase.words: - maxScore = max(ttable.get_score(f, e, 1) for e in ewords) - yield -math.log10(maxScore) if maxScore > 0 else MAXSCORE - return sum(score()) - return feature - -def IsSingletonF(fphrase, ephrase, paircount, fcount, fsample_count): - return (fcount == 1) - -def IsSingletonFE(fphrase, ephrase, paircount, fcount, fsample_count): - return (paircount == 1) - -def IsNotSingletonF(fphrase, ephrase, paircount, fcount, fsample_count): - return (fcount > 1) - -def IsNotSingletonFE(fphrase, ephrase, paircount, fcount, fsample_count): - return (paircount > 1) - -def IsFEGreaterThanZero(fphrase, ephrase, paircount, fcount, fsample_count): - return (paircount > 0.01) |