Python矩阵索引(Python matrix indexing)

Python矩阵索引(Python matrix indexing)

我有以下代码

l = len(time) #time is a 300 element list ll = len(sample) #sample has 3 sublists each with 300 elements w, h = ll, l Matrix = [[0 for x in range(w)] for y in range(h)] for n in range(0,l): for m in range(0,ll): x=sample[m] Matrix[m][n]= x

当我运行代码来填充矩阵时，我得到一条错误消息，说“列表索引超出范围”我输入了一个print语句来查看错误发生的位置，当m = 0且n = 3时，矩阵超出索引。

根据我对代码第四行的理解，我初始化了一个3X300矩阵，那为什么它会在0X3时超出索引？

I have the following code

l = len(time) #time is a 300 element list ll = len(sample) #sample has 3 sublists each with 300 elements w, h = ll, l Matrix = [[0 for x in range(w)] for y in range(h)] for n in range(0,l): for m in range(0,ll): x=sample[m] Matrix[m][n]= x

When I run the code to fill the matrix I get an error message saying "list index out of range" I put in a print statement to see where the error happens and when m=0 and n=3 the matrix goes out of index.

from what I understand on the fourth line of the code I initialize a 3X300 matrix so why does it go out of index at 0X3 ?

最满意答案

您需要将Matrix[m][n]= x更改为Matrix[n][m]= x

You need to change Matrix[m][n]= x to Matrix[n][m]= x