change matlab linear index to numpy.

Question

Sure 2023-6-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1977759-change-matlab-linear-index-to-numpy

回答： Kautuk Raj 2023-6-3

I have a three-dimensional matrix X with dimensions 16 x 10 x 1200. The original program used

    for i = 3876:10000
        My(:,:,i) = X(:,i)*X(:,i)';  
    end

Obviously, this program uses linear indexing in Matlab. I have read the relevant documentation for Matlab and NumPy, but I still do not know how to convert it to the corresponding operation in NumPy. Can anyone help me? Thank you very much.

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Answer 1

Kautuk Raj 2023-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/1977759-change-matlab-linear-index-to-numpy#answer_1249699

在 MATLAB Online 中打开

This can be the equivalent NumPy code for the given MATLAB code:

import numpy as np
X = np.random.rand(16, 10, 1200)
My = np.zeros((16, 16, 10000-3876+1))
for i in range(3876, 10001):
    My[:, :, i-3876] = np.outer(X[:, i-1], X[:, i-1])