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CdiffImplicit: Fixed a bug. Switched to LU.
author Jonatan Werpers <jonatan@werpers.com>
date Mon, 12 Dec 2016 11:35:23 +0100
parents 9c0192cf099f
children 8e0067aef5b0
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function A = spdiag(a,i)
    default_arg('i',0);
    n = length(a)-abs(i);
    A = spdiags(a,i,n,n);
end