Companion software to accompany the book "Numerical Methods Using MATLAB"
function X=trisys (A,D,C,B)
%Input - A is the sub diagonal of the coefficient matrix
% - D is the main diagonal of the coefficient matrix
% - C is the super diagonal of the coefficient matrix
% - B is the constant vector of the linear system
%Output - X is the solution vector
% NUMERICAL METHODS: Matlab Programs
% (c) 2004 by John H. Mathews and Kurtis D. Fink
% Complementary Software to accompany the textbook:
% NUMERICAL METHODS: Using Matlab, Fourth Edition
% ISBN: 0-13-065248-2
% Prentice-Hall Pub. Inc.
% One Lake Street
% Upper Saddle River, NJ 07458
for k= N-1:-1:1