How to change the values of the corners in a matrix

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N/A 2022-4-28

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1706930-how-to-change-the-values-of-the-corners-in-a-matrix

回答： Chunru 2022-4-28

Hi,

Lets say I have a 100 * 100 matrix filled with zeros and I need to change the 4 corners to the value 1. What would be the best way to alter it?

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Answer 1

Chunru 2022-4-28

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1706930-how-to-change-the-values-of-the-corners-in-a-matrix#answer_952635

在 MATLAB Online 中打开

a= zeros(10, 10);  % smaller matrix for easy display
% for corners
a([1 end], [1 end]) = 1;
a
a = 10×10
     1     0     0     0     0     0     0     0     0     1
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     1     0     0     0     0     0     0     0     0     1