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comparison doc/interpreter/sparse.txi @ 5652:f37b562ec93c

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[project @ 2006-03-09 15:12:20 by dbateman]
author dbateman
date Thu, 09 Mar 2006 15:12:21 +0000
parents 69a4f320d95a
children 233d98d95659
comparison
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5651:6d0ea746f50f 5652:f37b562ec93c
590 @caption{Structure of simple sparse matrix.} 590 @caption{Structure of simple sparse matrix.}
591 @end float 591 @end float
592 592
593 The standard Cholesky factorization of this matrix, can be 593 The standard Cholesky factorization of this matrix, can be
594 obtained by the same command that would be used for a full 594 obtained by the same command that would be used for a full
595 matrix. This can be visualized with the command @code{r = 595 matrix. This can be visualized with the command
596 chol(A); spy(r);}, @xref{fig:simplechol}. The original matrix 596 @code{r = chol(A); spy(r);}.
597 had 597 @ifset HAVE_CHOLMOD
598 @ifset HAVE_COLAMD
599 @xref{fig:simplechol}.
600 @end ifset
601 @end ifset
602 The original matrix had
598 @ifinfo 603 @ifinfo
599 @ifnothtml 604 @ifnothtml
600 43 605 43
601 @end ifnothtml 606 @end ifnothtml
602 @end ifinfo 607 @end ifinfo
993 @end example 998 @end example
994 999
995 Finally, in order to display the solution, we show each solved voltage 1000 Finally, in order to display the solution, we show each solved voltage
996 value in the z-axis for each simplex vertex. 1001 value in the z-axis for each simplex vertex.
997 @ifset htmltex 1002 @ifset htmltex
1003 @ifset HAVE_CHOLMOD
1004 @ifset HAVE_UMFPACK
1005 @ifset HAVE_COLAMD
998 @xref{fig:femmodel}. 1006 @xref{fig:femmodel}.
1007 @end ifset
1008 @end ifset
1009 @end ifset
999 @end ifset 1010 @end ifset
1000 1011
1001 @example 1012 @example
1002 elemx = elems(:,[1,2,3,1])'; 1013 elemx = elems(:,[1,2,3,1])';
1003 xelems = reshape (nodes(elemx, 1), 4, E); 1014 xelems = reshape (nodes(elemx, 1), 4, E);