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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>>> aarray([3,1,2])>

import pylab as plimport numpy as npfrom sklearn.neighbors import KNeighborsClassifierfrom sklearn.metrics import classification_reportfrom sklearn.cross_validation import train_test_split,Stratif