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view +util/matrixborrow.m @ 1045:dc1bcbef2a86 feature/getBoundaryOp

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Remove ability to get several boundary ops at the same time from a few of the schemes While it can be handy the code for the getBoundaryOp methods get needlessly cluttered
author Jonatan Werpers <jonatan@werpers.com>
date Tue, 22 Jan 2019 17:12:22 +0100
parents 48b6fb693025
children
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function alpha = matrixborrow(A,B)

    function y = neg(x)
        y = min(eig(A-x*B));
    end


    x0 = 1;
    while neg(x0) > -1
        x0 = 2*x0;
    end

    opt = optimset('Display','none');
    alpha = fsolve(@neg, x0,opt);
end