expanding the existing matrix

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mahesh chathuranga
mahesh chathuranga 2013-9-12
I have a matrix like this.
M=[1 2 3;
4 5 6].
I want to expanding it into
M'=[1 1 2 2 3 3;
1 1 2 2 3 3;
1 1 2 2 3 3;
4 4 5 5 6 6;
4 4 5 5 6 6;
4 4 5 5 6 6].
I try to do this.but stil i could not get correct result?

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2013-9-12
编辑：Andrei Bobrov 2013-9-12
kron(M,ones(3,2))
or
m = 3;
n= 2;
s = size(M);
out = reshape(permute(reshape(repmat(M,m,n),s(1),m,s(2),n),[2 1 4 3]),m*s(1),[]);

更多回答（1 个）

Matt J
Matt J 2013-9-12
Instead of expanding it (resulting in more memory consumption) consider using this instead
http://www.mathworks.com/matlabcentral/fileexchange/25969-efficient-object-oriented-kronecker-product-manipulation

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