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view stripeMatrix.m @ 1325:1b0f2415237f feature/D2_boundary_opt

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Add variable coefficient boundary-optimized second derivatives.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Sun, 13 Feb 2022 19:32:34 +0100
parents 5cb99f56f55e
children
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% Creates a matrix of size n,m with the values of val on the diagonals diag.
%   A = stripeMatrix(val,diags,n,m)
function A = stripeMatrix(val,diags,n,m)
    default_arg('m',n);

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