?? lec11mldemo1.m
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% MIT 18.335 - Lecture 11 MATLAB Demo 1
% LU Factorization without Pivoting
% Per-Olof Persson, October 17, 2006
% Create matrix A
A=[2,1,1,0; 4,3,3,1; 8,7,9,5; 6,7,9,8]
L1=mkL(4,[-2,-4,-3])
L1*A
L2=mkL(4,[-3,-4])
L2*L1*A
L3=mkL(4,-1)
L3*L2*L1*A
U=L3*L2*L1*A
[L1,inv(L1)]
[L2,inv(L2)]
[L3,inv(L3)]
L=inv(L1)*inv(L2)*inv(L3)
L*U
A
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