increasing spdiags matrix at each iteration

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sensation
sensation 2017-5-19
编辑： James Tursa 2017-5-19
Hi, I was wondering if someone has an idea how to horzcat at each iteration spdiag matrix? Thanks!!!
ot = ones(N,1);
N=50;
for i=1:10
if i=1
A2 = spdiags([ot ot -ot -ot],[0 N -1 N-1],N,N*2);
else
%%desired result
%%for i=2 it should be A2 = horzcat(A2,A2);
% for i=3 A2 = horzcat(A2,A2,A2) and so on;
end
end

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回答（1 个）

James Tursa
James Tursa 2017-5-19
编辑：James Tursa 2017-5-19
A2 = repmat(A2,1,i);
But it seems to me that you may be running into memory problems with this, since A2 is recursively using the last A2 with repmat to build the new A2.

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