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%SQR_EXAMPLE test cs_sqr
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% Copyright 2006-2007, Timothy A. Davis.
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% http://www.cise.ufl.edu/research/sparse
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[vnz, rnz, parent, c, leftmost, p] = cs_sqr(A) ;
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B = [A ; sparse(m2-m,n)] ;
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subplot (2,2,1) ; spy(A)
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subplot (2,2,3) ; spy (chol (A'*A + 100*speye(n))) ;
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subplot (2,2,4) ; spy (R1) ;