def uncertainty(orig, langin, trans, langout, change):
# print 'UNCERTAINTY'
t = make_string(trans)
words = split_n_gramm(t)
# print words
sum_entropy = 0.0
i = 0
n = 5
while i < len(words):
try:
if i + n < len(words):
sum_entropy += log(
n_gramm_estimation(words[i:i + n], langout, n), 2)
else:
sum_entropy += log(
n_gramm_estimation(words[i:len(words)], langout,
len(words) - i), 2)
i += n
except:
sum_entropy += -99999
sum_max_prob = 0.0
e_log = sum_entropy
# print 'Entropy = ', sum_entropy
for (i, n_gramm) in enumerate(trans):
try:
t_gramm = Ngramm.objects.get(n_gramm=n_gramm, lang=langout)
o_gramm = Ngramm.objects.get(n_gramm=orig[i], lang=langout)
if change:
sum_max_prob += log(
Translation.objects.get(orig=n_gramm,
lang_orig=langout,
trans=orig[i],
lang_trans=langin).probability, 2)
else:
sum_max_prob += log(
Translation.objects.get(orig=orig[i],
lang_orig=langin,
trans=n_gramm,
lang_trans=langout).probability, 2)
except:
# sum_frequence = -99999
sum_max_prob += -99999
# try:
# e_log = log(sum_entropy, 2)
# except:
# e_log = -99999
power = -1 * (e_log + sum_max_prob / len(trans))
# print power
if power > 10:
# print 'a ', power
return power
# print 'b ',power
return pow(2, power)
def cross_entropy(text, langout, size):
sum = 0.0
text = make_string(text)
words = split_n_gramm(text)
# разбиваем на н-граммы высшего порядка
# words = join_by_n(text, size)
i = 0
while i < len(words):
try:
if i+size < len(words):
sum += log(n_gramm_estimation(words[i:i+size], langout, size), 2)
else:
sum += log(n_gramm_estimation(words[i:len(words)], langout, len(words)-i), 2)
except:
sum += -99999
i += size
return sum / len(words)
def uncertainty(orig, langin, trans, langout, change):
# print 'UNCERTAINTY'
t = make_string(trans)
words = split_n_gramm(t)
# print words
sum_entropy = 0.0
i = 0
n = 5
while i < len(words):
try:
if i+n < len(words):
sum_entropy += log(n_gramm_estimation(words[i:i+n], langout, n), 2)
else:
sum_entropy += log(n_gramm_estimation(words[i:len(words)], langout, len(words)-i), 2)
i += n
except:
sum_entropy += -99999
sum_max_prob = 0.0
e_log = sum_entropy
# print 'Entropy = ', sum_entropy
for (i, n_gramm) in enumerate(trans):
try:
t_gramm = Ngramm.objects.get(n_gramm=n_gramm, lang=langout)
o_gramm = Ngramm.objects.get(n_gramm=orig[i], lang=langout)
if change:
sum_max_prob += log(Translation.objects.get(orig=n_gramm, lang_orig=langout, trans=orig[i], lang_trans=langin).probability, 2)
else:
sum_max_prob += log(Translation.objects.get(orig=orig[i], lang_orig=langin, trans=n_gramm, lang_trans=langout).probability, 2)
except:
# sum_frequence = -99999
sum_max_prob += -99999
# try:
# e_log = log(sum_entropy, 2)
# except:
# e_log = -99999
power = -1*(e_log + sum_max_prob/len(trans))
# print power
if power > 10:
# print 'a ', power
return power
# print 'b ',power
return pow(2, power)
def cross_entropy(text, langout, size):
sum = 0.0
text = make_string(text)
words = split_n_gramm(text)
# разбиваем на н-граммы высшего порядка
# words = join_by_n(text, size)
i = 0
while i < len(words):
try:
if i + size < len(words):
sum += log(
n_gramm_estimation(words[i:i + size], langout, size), 2)
else:
sum += log(
n_gramm_estimation(words[i:len(words)], langout,
len(words) - i), 2)
except:
sum += -99999
i += size
return sum / len(words)
def get_n(self):
return len(split_n_gramm(self.n_gramm))
