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函数： tile(A,(x, y)) 重复A，x行y列 tile(A,x) 重复A x次 返回 array类型 >>> numpy.tile([1,2],(1,2)) array([1,2,1,2]) mat.sum(axis=0) 计算行和 mat.sum(axis=1) 计算列和 argsort() 返回排序后的下标 >>> a array([3,1,2]) >

import pylab as pl import numpy as np from sklearn.neighbors import KNeighborsClassifier from sklearn.metrics import classification_report from sklearn.cross_validation import train_test_split,Stratif