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view diags.m @ 849:5b180c76578e feature/burgers1d

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Use the old implementation for RK4 until the different methods are profiled.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 21 Sep 2018 09:13:03 +0200
parents 0b87863cb29c
children
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function A = diags(B,d,m,n)
    assert(size(B,1) == m);

    A = repmat(B(:,1)*0, [1, n]);

    for i = 1:size(B,2)
        A(:,d(i)+ (1:m)) = A(:,d(i)+ (1:m)) + diag(B(:,i));
    end
end