Matrix Conversion

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rahman
rahman 2011-4-18
Hi all
I have a 1-by-N^4 matrix that I want to convert in to N^2-by-N^2 matrix(for example:a=[1 2 3 4] to b=[1 2;3 4]). I use this code:
for ii=1:N^2
b(ii,1:N^2)=a((ii-1)*(N^2)+1:ii*(N^2));
end
But for larg N this is very time consuming.
1-Is there any command do that?
2-How can I set the index for using PARFOR loop?

采纳的回答

Oleg Komarov
Oleg Komarov 2011-4-18
use reshape:
a = [1 2 3 4];
reshape(a,2,2).'
You may find also useful Resizing and Reshaping Matrices

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