view stripeMatrixPeriodic.m @ 1258:74eec7e69b63 feature/FMMlabb

Speed up computations using RungeKuttaSecondOrder when only the source term is time dependent.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 13 Mar 2020 12:07:00 +0100
parents bbf303c1f0cf
children
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% Creates a periodic discretization matrix of size n x n
%  with the values of val on the diagonals diag.
%   A = stripeMatrix(val,diags,n)
function A = stripeMatrixPeriodic(val,diags,n)

    D = ones(n,1)*val;
    A = spdiagsPeriodic(D,diags);
end