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Re: Banded matrix with dirty off-diagonal triagles
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From: |
Mario Storti |
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Subject: |
Re: Banded matrix with dirty off-diagonal triagles |
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Date: |
Wed, 17 Jun 1998 13:31:29 -0300 |
My apologies. In my previous posting, I forgot to include the off
diagonal terms when showing the matrix. I missed to show the following
steps, but the rest of the mail, and the renumbering is still valid!
octave> A(1,20)=-1;
octave> A(20,1)=-1;
octave> A(1,20)=-1;
octave> A
A =
2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1
-1 2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 -1 2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 -1 2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 -1 2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 -1 2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 -1 2 -1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 -1 2 -1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 -1 2 -1 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 -1 2 -1 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 -1 2 -1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 -1 2 -1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 -1 2 -1 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 -1 2 -1 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 -1 2 -1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 2 -1 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 2 -1 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 2 -1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 2 -1
-1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 2
Mario