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我有這個表(NumSucc =成功次數,NumberTrials =試驗和習題的數量是成功的概率):excel和scipy累積二項式分佈p值之間的區別?
Gene NumSucc NumTrials Prob
Gene1 16 26 0.9548
Gene2 16 26 0.9548
Gene3 12 21 0.9548
Gene4 17 27 0.9548
Gene5 17 27 0.9548
Gene6 17 27 0.9548
Gene7 8 15 0.9548
Gene8 10 17 0.9548
我想每一行的累積二項分佈的P值。當我把這種確切的表到Excel列AD,然後在塔E鍵入函數(例如,用於行2):
=BINOMDIST(B2,C2,D2,1)
輸出表看起來像這樣:
Gene NumSucc NumTrials Prob Binomial
Gene1 16 26 0.9548 9.68009E-08
Gene2 16 26 0.9548 9.68009E-08
Gene3 12 21 0.9548 1.40794E-07
Gene4 17 27 0.9548 1.47463E-07
Gene5 17 27 0.9548 1.47463E-07
Gene6 17 27 0.9548 1.47463E-07
Gene7 8 15 0.9548 1.79741E-06
Gene8 10 17 0.9548 5.01334E-06
可選地,當我把這個確切的表到SciPy的與此代碼:
import glob
import os
import scipy
from scipy.stats.distributions import binom
import sys
def WriteBinomial(InputFile,output):
open_input_file = open(InputFile, 'r').readlines()[1:]
for line in open_input_file:
line = line.strip().split()
GeneName,num_succ,num_trials,prob = line[0],int(line[1]),int(line[2]),float(line[3])
print GeneName + "\t" + str(num_succ) + "\t" + str(num_trials) + "\t" + str(prob) + "\t" + str((binom.cdf(num_succ-1, num_trials, prob)))
WriteBinomial(sys.argv[1],sys.argv[2])
輸出是:
GeneName NumSucc NumTrials Prob Binomial
Gene1 16 26 0.9548 6.59829603211e-09
Gene2 16 26 0.9548 6.59829603211e-09
Gene3 12 21 0.9548 7.92014917046e-09
Gene4 17 27 0.9548 1.06754559723e-08
Gene5 17 27 0.9548 1.06754559723e-08
Gene6 17 27 0.9548 1.06754559723e-08
Gene7 8 15 0.9548 8.41770305586e-08
Gene8 10 17 0.9548 2.93060582331e-07
有誰知道爲什麼這兩種方法不能給出相同的結果?