make matrix from other matrix ?

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jumana eltrabelsi on 16 Apr 2022

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Edited: Jan on 16 Apr 2022

我双但当输入矩阵of matrix [1,1,1,1,2,2,2,3,...] and i want other matrix to be like this

[ 1 1 0 0

0 0 1 0

0 0 0 1

]

how to do it is where some way to make if statement on row and cell data with for loop and make other matrix depance on it?

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Xinzhi江 on 16 Apr 2022

I'm not following what you are trying to do here. What do you mean by "if row == 6 on matrix 1"? As in "when M1(6) == 1"? And do you intend to make one M2 matrix every time you check an M1(i) element? More elaboration with another example of what you are trying to achieve would be helpful

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Jan on 16 Apr 2022

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Edited:Jan on 16 Apr 2022

可能:

                              row = [1,1,1,1,2,2,2,3];
                             
                              s1 = max(row);
                             
                              s2 = numel(row);
                             
                              M = zeros(s1, s2);
                             
                              M(sub2ind([s1, s2], row, 1:s2)) = 1
                             
                                 M =
                                 3×8
                                
                                  1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1

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