?? elimnor.m
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function x2 = elimnor(A1,A2,A3,b1,b2)
% ELIMNOR Eliminates the unknowns x1
% from the normal equations
% [A1 A2] |x1| = |b1|
% [A2' A3] |x2| |b2|
% and solves for x2
%Kai Borre 07-28-96
%Copyright (c) by Kai Borre
%$Revision: 1.0 $ $Date: 1997/09/26 $
if nargin == 0
A1 = [4];
A2 = [8];
A3 = [26];
b1 = [36];
b2 = [112];
end;
x2 = inv(A3-A2'*inv(A1)*A2)*(b2-A2'*inv(A1)*b1);
%%%%%%%%%%%%%% end elimnor.m %%%%%%%%%%%%%%%%%%%%
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