Making a matrix of same size from different matrices of same size

Question

surendra kumar Aralapura mariyappa 2019-6-20

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https://ww2.mathworks.cn/matlabcentral/answers/468027-making-a-matrix-of-same-size-from-different-matrices-of-same-size

编辑： KALYAN ACHARJYA 2019-6-20

Hey all,

I have tried to find solution to my problem on MATLAB community, but I couldn't. So I am here to get the soultion to my problem.

I have a three matrices of same size. Now I need to make one matrix from three different matrices of same size.

For an example;

A = [ 0        13.2011           0             0         0;
2011         0          11.1861          0         0;
      11.1861          0               0        0;
         0              0              0       0;
       0            0                0      0];
B = [  0            0            0        0         0.0025;
         .0256             0      0         0.0028;
    .4563            0           0        0         0.0025;
          0             0       0          0;
0025       0.0028       0.0025     0          0];
C  = [0     0      0         0.145        0;
  0      0         0        0;
  0      0         18.254    0;
  0       18.254    0         0;
  0      0          0        0];

Now I need D matrix of same size. It is just a simple matrix, so elements of the indices will be changed from 0 to value or value to 0 depending on the condition, so I need general solution to make one Single matrix

Note; if the element of a matrix A is not a zero, then element of other two matrices will be zero always, even for 10*10 matrix.

For an example A(1,2) = some value, B(1,2) and C (1,2) will be zero.

I tried using below solution; But didn't work.

D (:,:,1) = - A;
D (:,:,2) = - B;
D (:,:,3) = - C;

After I got the matrix D, again I have to do some calculation on D and using D. So I need D matrix as D(n,m) not D(n,m,p);

It would be fine, if the matrix D(:,:,p) become D (:,:), but contains all the elements of A, B and C, not just oly C or B or A.

I hope my question is correct.

Any suggestions and answers are much appreciated.

Thanks in advance.

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surendra kumar Aralapura mariyappa 2019-6-20

Thanks Kalyan, sometimes, my brain will be dead. Anyways thank you so much,

KALYAN ACHARJYA 2019-6-20

编辑：KALYAN ACHARJYA 2019-6-20

Haha..@Surendra Ji

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Answer 1

Aravind Ravikumar 2019-6-20

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在 MATLAB Online 中打开

Hey, if only one element in same index of the matrix A,B,C will be non-zero, then you could just do D= A+B+C to get the following result. Is this how you want D to be combined as?

A =
         0   13.2011         0         0         0
   13.2011         0   11.1861         0         0
         0   11.1861         0         0         0
         0         0         0         0         0
         0         0         0         0         0
B =
         0         0         0         0    0.0025
         0    0.0256         0         0    0.0028
    0.4563         0         0         0    0.0025
         0         0         0         0         0
    0.0025    0.0028    0.0025         0         0
C =
         0         0         0    0.1450         0
         0         0         0         0         0
         0         0         0   18.2540         0
         0         0   18.2540         0         0
         0         0         0         0         0
D =
         0   13.2011         0    0.1450    0.0025
   13.2011    0.0256   11.1861         0    0.0028
    0.4563   11.1861         0   18.2540    0.0025
         0         0   18.2540         0         0
    0.0025    0.0028    0.0025         0         0
    
    