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view stripeMatrix.m @ 1065:c2bd7f15da48 feature/laplace_curvilinear_test

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Add scheme where only corner points are multiplied by dim. Does not seem to decrease spectral radius much, but is stable.
author Martin Almquist <malmquist@stanford.edu>
date Thu, 17 Jan 2019 18:57:54 -0800
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