How can I change all numbers in matrix to 1? except for 0

Question

Chris 2022-12-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1869917-how-can-i-change-all-numbers-in-matrix-to-1-except-for-0

回答： Walter Roberson 2022-12-3

采纳的回答： Voss

How can I change all numbers in matrix to 1? except for 0

I want to make the matrix which has 1(all the numbers) or 0.

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Answer 1

Voss 2022-12-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1869917-how-can-i-change-all-numbers-in-matrix-to-1-except-for-0#answer_1118892

编辑：Voss 2022-12-3

在 MATLAB Online 中打开

One way:

M = randi(4,[5 5])-2 % a matrix with zero and non-zero elements
M = 5×5
    -1     0     0     1     2
    -1    -1     2     1     2
    -1     1    -1     1     0
     2     0    -1     1     2
     0     0     1     2     1
M(M ~= 0) = 1 % replace non-zero elements with ones
M = 5×5
     1     0     0     1     1
     1     1     1     1     1
     1     1     1     1     0
     1     0     1     1     1
     0     0     1     1     1

Another way:

M = randi(4,[5 5])-2 % a matrix with zero and non-zero elements
M = 5×5
    -1     2     1     1     2
    -1     2     2     0    -1
     2    -1     0     2    -1
     1    -1     1    -1    -1
    -1    -1     0     0    -1
M(logical(M)) = 1 % replace non-zero elements with ones
M = 5×5
     1     1     1     1     1
     1     1     1     0     1
     1     1     0     1     1
     1     1     1     1     1
     1     1     0     0     1