summaryrefslogtreecommitdiff
path: root/gi/evaluation/conditional_entropy.py
diff options
context:
space:
mode:
Diffstat (limited to 'gi/evaluation/conditional_entropy.py')
-rw-r--r--gi/evaluation/conditional_entropy.py61
1 files changed, 0 insertions, 61 deletions
diff --git a/gi/evaluation/conditional_entropy.py b/gi/evaluation/conditional_entropy.py
deleted file mode 100644
index 356d3b1d..00000000
--- a/gi/evaluation/conditional_entropy.py
+++ /dev/null
@@ -1,61 +0,0 @@
-#!/usr/bin/env python
-
-import sys, math, itertools, getopt
-
-def usage():
- print >>sys.stderr, 'Usage:', sys.argv[0], '[-s slash_threshold] input-1 input-2'
- sys.exit(0)
-
-optlist, args = getopt.getopt(sys.argv[1:], 'hs:')
-slash_threshold = None
-for opt, arg in optlist:
- if opt == '-s':
- slash_threshold = int(arg)
- else:
- usage()
-if len(args) != 2:
- usage()
-
-ginfile = open(args[0])
-pinfile = open(args[1])
-
-# evaluating: H(G | P) = sum_{g,p} p(g,p) log { p(p) / p(g,p) }
-# = sum_{g,p} c(g,p)/N { log c(p) - log N - log c(g,p) + log N }
-# = 1/N sum_{g,p} c(g,p) { log c(p) - log c(g,p) }
-# where G = gold, P = predicted, N = number of events
-
-N = 0
-gold_frequencies = {}
-predict_frequencies = {}
-joint_frequencies = {}
-
-for gline, pline in itertools.izip(ginfile, pinfile):
- gparts = gline.split('||| ')[1].split()
- pparts = pline.split('||| ')[1].split()
- assert len(gparts) == len(pparts)
-
- for gpart, ppart in zip(gparts, pparts):
- gtag = gpart.split(':',1)[1]
- ptag = ppart.split(':',1)[1]
-
- if slash_threshold == None or gtag.count('/') + gtag.count('\\') <= slash_threshold:
- joint_frequencies.setdefault((gtag, ptag), 0)
- joint_frequencies[gtag,ptag] += 1
-
- predict_frequencies.setdefault(ptag, 0)
- predict_frequencies[ptag] += 1
-
- gold_frequencies.setdefault(gtag, 0)
- gold_frequencies[gtag] += 1
-
- N += 1
-
-hg2p = 0
-hp2g = 0
-for (gtag, ptag), cgp in joint_frequencies.items():
- hp2g += cgp * (math.log(predict_frequencies[ptag], 2) - math.log(cgp, 2))
- hg2p += cgp * (math.log(gold_frequencies[gtag], 2) - math.log(cgp, 2))
-hg2p /= N
-hp2g /= N
-
-print 'H(P|G)', hg2p, 'H(G|P)', hp2g, 'VI', hg2p + hp2g