view spdiag.m @ 619:9dd49d622a4c feature/grids

Add a function for easily applying many boundary conditions at the same time
author Jonatan Werpers <jonatan@werpers.com>
date Fri, 20 Oct 2017 16:01:43 +0200
parents 8e0067aef5b0
children e76321b89c1e
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function A = spdiag(a,i)
    default_arg('i',0);

    if isrow(a)
        a = a';
    end

    n = length(a)-abs(i);
    A = spdiags(a,i,n,n);
end