将文本转化为Numpy的矩阵

def file2matrix(filename):fr = open(filename)numberOfLines = len(fr.readlines())         #get the number of lines in the filereturnMat = zeros((numberOfLines,3))        #prepare matrix to returnclassLabelVector = []                       #prepare labels return   fr = open(filename)index = 0for line in fr.readlines():line = line.strip()listFromLine = line.split('\t')returnMat[index,:] = listFromLine[0:3]classLabelVector.append(int(listFromLine[-1]))index += 1return returnMat,classLabelVector