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I promised to send along some help on how to do row operations
in Octave. Fortunately this has been a problem that many folks have tackled
before, so let me ask you to start by downloading three Octave functions
written by Dr. Doug Rall at Furman.
<a href="http://math.furman.edu/%7Edrall/mth160-2013-F/elemrow1.m">elemrow1.m </a>
<a href="http://math.furman.edu/%7Edrall/mth160-2013-F/elemrow2.m">elemrow2.m</a>
<a href="http://math.furman.edu/%7Edrall/mth160-2013-F/elemrow3.m">elemrow3.m</a>
Save these in the directory where you will run Octave. To see how to
use them type "help elemrow1" in Octave. Below I will use the third
operation to row reduce the linear system via Gaussian Elimination (the
example I worked in class yesterday)
octave:2> A = [2,1,3,1;4,4,7,1;2,5,9,3]
A =
2 1 3 1
4 4 7 1
2 5 9 3
octave:3> A = elemrow3(A,1,2,-2)
A =
2 1 3 1
0 2 1 -1
2 5 9 3
octave:4> A = elemrow3(A,1,3,-1)
A =
2 1 3 1
0 2 1 -1
0 4 6 2
octave:5> A = elemrow3(A,2,3,-2)
A =
2 1 3 1
0 2 1 -1
0 0 4 4
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<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
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