Python——生成矩阵

def makeMatrix(row_num, column_num, start=0.1, step=0):
    matrix = []
    row = []
    for i in range(row_num):
        for j in range(column_num):
            row.append(start)
            start += step
        matrix.append(row)
        row = []
    return matrix

参数解释：row_num=行数  column_num = 列数  start=第一行第一列元素的值  step=步长

经常用到，记录一下