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view +util/matrixborrow.m @ 917:878652b22157 feature/timesteppers

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Make time.rk.rungekutta return stage approximations and stage rates in addition to the solution after one time step.
author Martin Almquist <malmquist@stanford.edu>
date Mon, 26 Nov 2018 16:12:27 -0800
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