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view stencilEquation.m @ 829:e0913772dc1c feature/operator_files

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Add D2 files
author Ylva Rydin <ylva.rydin@telia.com>
date Mon, 10 Sep 2018 19:25:41 +0200
parents 184833fe4c0e
children
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% Find the equation for the stencil for d^k/dx^k
function [A,b] = stencilEquation(k, offsets, order)
    q = sym('q', [1, length(offsets)]);

    p = 0:(order-1+k);

    v     = vandermonde(offsets, p);
    vdiff = vandermonde(      0, p-k);

    eq = q*v == vdiff;

    [A,b] = equationsToMatrix(eq, q);
end