gddlZddlmZddlmZddlmZ ddlmZddl m Z m Z dZ dZd Zdd Zd Zd Zd Zedk(reyy#e $rdZY5wxYw)N)reduce)fabs)shuffle)betai)LazyConcatenationLazyMapct|t|k7r tdtdt||Dt|z S)a, Given a list of reference values and a corresponding list of test values, return the fraction of corresponding values that are equal. In particular, return the fraction of indices ``0zaccuracy..'s7"6$!QqAv"6slen ValueErrorsumzip referencetests raccuracyrsA 9~T";<< 7#i"67 7#d) CCct|dr t|ds tdt|dk(ryt|j|t|z S)a Given a set of reference values and a set of test values, return the fraction of test values that appear in the reference set. In particular, return card(``reference`` intersection ``test``)/card(``test``). If ``test`` is empty, then return None. :type reference: set :param reference: A set of reference values. :type test: set :param test: A set of values to compare against the reference set. :rtype: float or None intersection!reference and test should be setsrNhasattr TypeErrorrrrs r precisionr#*sP 9n -WT>5R;<< 4yA~9))$/03t9<5R;<< 9~9))$/03y>AArctt||}t||}||y|dk(s|dk(ryd||z d|z |z zz S)a- Given a set of reference values and a set of test values, return the f-measure of the test values, when compared against the reference values. The f-measure is the harmonic mean of the ``precision`` and ``recall``, weighted by ``alpha``. In particular, given the precision *p* and recall *r* defined by: - *p* = card(``reference`` intersection ``test``)/card(``test``) - *r* = card(``reference`` intersection ``test``)/card(``reference``) The f-measure is: - *1/(alpha/p + (1-alpha)/r)* If either ``reference`` or ``test`` is empty, then ``f_measure`` returns None. :type reference: set :param reference: A set of reference values. :type test: set :param test: A set of values to compare against the reference set. :rtype: float or None Nrg?)r#r%)rralphaprs r f_measurer+VsT0 )T"Ay$AyAIAva %!)q5yAo- ..rct|t|k7r tdtdt||D}|t|z S)a Given a list of reference values and a corresponding list of test probability distributions, return the average log likelihood of the reference values, given the probability distributions. :param reference: A list of reference values :type reference: list :param test: A list of probability distributions over values to compare against the corresponding reference values. :type test: list(ProbDistI) r c3DK|]\}}|j|ywr )logprob)rvaldists rrz!log_likelihood..s U@T#t4<<,@Ts r)rrtotal_likelihoods rlog_likelihoodr2wsI 9~T";<<UIt@TUU c)n ,,rc |jdd}t|ttjt dt |t |zdz}|jdd}|jdd}|rtd|zt||||z }|rtd |ztd d }t||gtt t |t |z}t |D]} |r| d zd k(rtd| zt||tfd|dt |} |tfd|t |d} t| | z } | |k\r|dz }|s| d zd k(std| ztd|dz| dzz ztd |dz|dzz } |r9td| ztr%dD] }td|ddt|||d"| ||fS)an Returns an approximate significance level between two lists of independently generated test values. Approximate randomization calculates significance by randomly drawing from a sample of the possible permutations. At the limit of the number of possible permutations, the significance level is exact. The approximate significance level is the sample mean number of times the statistic of the permutated lists varies from the actual statistic of the unpermuted argument lists. :return: a tuple containing an approximate significance level, the count of the number of times the pseudo-statistic varied from the actual statistic, and the number of shuffles :rtype: tuple :param a: a list of test values :type a: list :param b: another list of independently generated test values :type b: list shufflesir' statisticc0t|t|z Sr )rr)lsts rzapproxrand..ss3x#c(/BrverboseFz shuffles: %dzactual statistic: %fz<------------------------------------------------------------g0.++ rz shuffle: %dc|Sr r ir7s rr8zapproxrand.. s1vrNc|Sr r r<s rr8zapproxrand..r>rzpseudo-statistic: %fzsignificance: %f)g{Gz?g?g?g333333?g??z prob(phi<=fz): )getminroperatormulrangerprintrrlistrrr)abkwargsr4statr9 actual_statcindicesr= pseudo_stat_a pseudo_stat_b pseudo_stat significancephir7s @r approxrandrUs*zz*c*H8VHLL%3q6CF?Q;N2OPQH ::k#B CDjjE*G nx'(tAwa()K ${23 hA QF #C5Q#a&)*G 8_ q2v{ -!# $W%5wxQ7HIJ W%5ws1vx7HIJ ==89 + % FA q2v{ (;6 7 $Q1q5(9: ; (O!$Ehl+L  </0 ; 3q'U1h-DQ,GHI< !X &&rctddj}dj}td|td|tdt||tdt|}t|}td|td|tdt ||td t ||td t ||tdy) NzK---------------------------------------------------------------------------z DET NN VB DET JJ NN NN IN DET NNz DET VB VB DET NN NN NN IN DET NNz Reference =z Test =z Accuracy:z Test = z Precision:z Recall:z F-Measure:)rGsplitrsetr#r%r+)rr reference_settest_sets rdemor[s (O288:I - 3 3 5D -# +t +x 401 (O NM4yH -' +x  , -:; ,}h78 , -:; (Or__main__)r@)rD functoolsrmathrrandomrscipy.stats.statsr ImportError nltk.utilrrrr#r%r+r2rUr[__name__r rrrdss'1D(=,B,/B-(B'J& zFg EsA AA