how in matrix insert other matrix

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Modestas Sekreckis
Modestas Sekreckis 2011-5-22
hi how in matrix insert other matrix? for example I have:
A=repmat(2, [6 6]);
B=repmat(1, [4 4]);
How I can insert B to A and get it:
A=
2 2 2 2 2 2
2 1 1 1 1 2
2 1 1 1 1 2
2 1 1 1 1 2
2 1 1 1 1 2
2 2 2 2 2 2

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Razvan
Razvan 2011-5-22
Try
[r,c]=size(B);
xpos=2;ypos=2;
A(xpos:xpos+r-1,ypos:ypos+c-1)=B;
, where xpos and ypos are the positions where you want to insert matrix B.
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Modestas Sekreckis
Modestas Sekreckis 2011-5-22
but I forgot to say one small detail, I use a 3D matrix in a real program. How then does it work?
Razvan
Razvan 2011-5-22
[x,y,z]=ind2sub(size(A),find(A==1));

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更多回答（1 个）

Ben Mitch
Ben Mitch 2011-5-22
A(2:5,2:5) = B;

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