Efficient way to divide array into tiles
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I use the following code to divide array into tiles
n=2;nrow=3;ncol=3;
A=reshape(1:36,6,6)
A=mat2cell(A,zeros(nrow,1)+n,zeros(ncol,1)+n);
A=reshape(A,1,[]);
A=cellfun(@(x) x(:),A,"UniformOutput",false);
A=cell2mat(A)
Now each column contains the element of each 2-by-2 tile.
The problem is when A is large and n is small the use of cell array creates significant overhead. Is there a more efficient way to do this?
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