Changing numbers in a matrix with new numbers

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Sebastian 2014-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/114500-changing-numbers-in-a-matrix-with-new-numbers

评论： Sebastian 2014-2-1

采纳的回答： Walter Roberson

I have a matrix A:

0 0 1 0 0

1 0 0 0 1

0 0 1 0 1

Then with some functions I find the coordinates of the 1 in the matrix and apply a code, after that those ones wont be ones anymore, will be a different number. How can I put the new numbers in the matrix, changing the ones with the new numbers?

In other words, I would like something like this:

0 0 7 0 0

6 0 0 0 7.6

0 0 8 0 8.1

I am going to put my code for easier understanding. Thank you!

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Walter Roberson 2014-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/114500-changing-numbers-in-a-matrix-with-new-numbers#answer_122956

在 MATLAB Online 中打开

A(logical(A)) = [6 7 8 8.6 8.1];

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Walter Roberson 2014-2-1

在 MATLAB Online 中打开

A = A.';
A(logical(A)) = [2 2.2 2.3 2.4];
A = A.';

MATLAB always goes down columns when assigning multiple values, not across rows.

Sebastian 2014-2-1

Thank you!

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MATLAB Language Fundamentals Matrices and Arrays Matrix Indexing

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