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How can I change all the elements in a matrix with value1 to a new value2?

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Michelle Clements 2020-10-15

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编辑： Ameer Hamza 2020-10-15

I have a 78X78 binary matrix. How can I change all the 0s to -1s?

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Torsten K 2020-10-15

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How about this?

m = randi([0,1],78) % 78x78 matrix with random integers in the interval 0..1
m(m==0)=-1 % Substitute all 0's b -1's

Best regards

Torsten

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Ameer Hamza 2020-10-15

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编辑：Ameer Hamza 2020-10-15

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Another approach

M; % 78x78 matrix
M_new = 2*M-1;

This will be faster as compared to the indexing approach.

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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