replace matrix A with the values of another matrix B

Question

Elysi Cochin 2022-5-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1719500-replace-matrix-a-with-the-values-of-another-matrix-b

编辑： Dyuman Joshi 2022-5-15

Having a matrix A as attached, how to replace all those 1 in A with the values in matrix B, so that i get a new matrix as newA

A(:,:,1) =
 0   1
 1   0
 1   1
A(:,:,2) =
 0   0
 0   0
 0   0
A(:,:,3) =
 1   0
 0   1
 0   0

B = [6 1 5; 2 6 7; 4 6 9];
B =
6     1     5
2     6     7
4     6     9

newA(:,:,1) =
 0   5
 6   0
 6   9
newA(:,:,2) =
 0   0
 0   0
 0   0
newA(:,:,3) =
 1   0
 0   7
 0   0

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Answer 1

Bruno Luong 2022-5-15

1
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https://ww2.mathworks.cn/matlabcentral/answers/1719500-replace-matrix-a-with-the-values-of-another-matrix-b#answer_964190

编辑：Bruno Luong 2022-5-15

在 MATLAB Online 中打开

A= cat(3, [ 0   0   1;
    0   1   0;
    0   1   1], ...
    [1   0   0,
    0   0   0;
    0   0   0], ...
    [0   1   0;
    1   0   1;
    1   0   0 ]);
B = [6 1 5; 2 6 7; 4 6 9];
A.*B
ans = 
ans(:,:,1) =

     0     0     5
     0     6     0
     0     6     9


ans(:,:,2) =

     6     0     0
     0     0     0
     0     0     0


ans(:,:,3) =

     0     1     0
     2     0     7
     4     0     0

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Answer 2

Dyuman Joshi 2022-5-15

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1719500-replace-matrix-a-with-the-values-of-another-matrix-b#answer_964195

编辑：Dyuman Joshi 2022-5-15

在 MATLAB Online 中打开

A(:,:,1) = [0   0   1; 0   1   0; 0   1   1];
A(:,:,2) = [1   0   0; 0   0   0; 0   0   0];
A(:,:,3) = [0   1   0; 1   0   1; 1   0   0];
B = [6 1 5; 2 6 7; 4 6 9];
newA=A.*B
newA = 
newA(:,:,1) =

     0     0     5
     0     6     0
     0     6     9


newA(:,:,2) =

     6     0     0
     0     0     0
     0     0     0


newA(:,:,3) =

     0     1     0
     2     0     7
     4     0     0