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Making a 3D Matrix and Adding Matrices to make a bigger matrix

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hamzah khan
hamzah khan 9 Nov 2019
Edited: Fabio Freschi 10 Nov 2019
Hello Guys, I have a small problem with the error in my for loop.
I am making a 3D matrix and afterwards using nested for loops to make a bigger matrix. here is my code. It is giving me the error
" Index in position 3 is invalid. Array indices must be positive integers or logical values."
I am writing my code:
B = [ 1 -1;
-1 1];
C = [ 2 -2;
-2 2];
D = [ 3 -3;
-3 3];
T = zeros(4,4)
d=zeros(2,2,3);
d(:,:,1) = B;
d(:,:,2) = C;
d(:,:,3) = D;
for k = 1:1:3
for i = 1:1:2
for j = 1:1:2
T(i+k-1,j+k-1) = d(i,j,k-1);
end
end
end

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Fabio Freschi
Fabio Freschi 10 Nov 2019
Fabio Freschi 님이 편집함. 10 Nov 2019
In the loop, you wrote
T(i+k-1,j+k-1) = d(i,j,k-1);
k starts from one, so you are trying to access the d(i,j,0) element that does not exists.
What is the expected output you want?

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