Question

如何在不使用numphy或任何其他程序的情况下读取文本文件，就像它是一个矩阵一样。例如：

1, 2, 3, 4
5, 6, 7, 8
9, 10, 11, 12

我想把列表看作是一个矩阵 - 读取每一列，好像它是一个类别L [0]，L [1]，L [2]和L [3]。我想取每列的意思，但我需要知道如何相应地阅读文本文件。

感谢您的帮助。

Answer 1

matrix = []  # create an empty matrix. We'll add entries to it from the file soon
with open('path/to/file') as infile:
    for line in infile:  # for each line in the file
        row = [float(i) for i in line.strip().split(',')]  # turn each element in the line into a floating point number
        matrix.append(row)  # treat that line of floating point numbers as a list, and add it as a row of the matrix

cols = zip(*matrix)  # transpose the matrix to get the columns
means = [sum(col)/len(col) for col in cols]  # compute the mean of each column

文本文件为矩阵

1 个答案: