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Asked by John
on 21 Aug 2013

Hello,

I'm relatively new to matlab and I'm trying to create a matrix like the example below. But I can't seem to get the code correct. I've tried the following code neither of which are correct. Would somebody be able to help me out?

Much appreciated

N=5; ot = ones(N,1); A = spdiags([-ot -ot],[0 N],N,N*2);

and

A = sparse(tril(ones(N)));

1 -1 11 -1-1 111 -1-1-1 1111 -1-1-1-1 11111-1-1-1-1-1

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