Placing Blocks of fixed size to random positions in a bigger matrix
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How do you place a smaller matrix(block) of fixed size in a bigger matrix at random positions?
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Andrei Bobrov
il 16 Nov 2011
M = zeros(5)
m = randi(4,3)
sM = size(M);
sm = size(m);
k=sM-sm+1;
iM = reshape(1:numel(M),sM(1),[]);
iw = iM(1:k(1),1:k(2));
im = bsxfun(@plus,(0:sm(1)-1).',0:sM(1):sM(1)*(sm(2)-1));
M(iw(randi(numel(m)))+im) = m
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Più risposte (1)
Fangjun Jiang
il 16 Nov 2011
a=rand(3);
A=magic(10);
[m,n]=size(a);
[M,N]=size(A);
i=floor((M-m)*rand)+1;
j=floor((N-n)*rand)+1;
A(i+1:i+m,j+1:j+n)=a
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