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linear_algebra/LU_tridiag.m

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function [ud,uo,lo]=LU_tridiag(e,f,g)
%This function takes 3 vectors as inputs and calculates the
%LU-decomposition of a tridiagonal matrix. The output is 3
%vectors, the diagonal of the upper matrix, and the two off-
%diagonal vectors of the lower and upper matrices.
A = gallery('tridiag', e, f, g);
[L,U,P]=lu(A);
ud = U;
lo = L;
uo = P;
end