[mathcad] RE: How to fill a column of a matrix?

Author: Bill Brady Posted: Tue, 17 Jan 2006 13:13:33 -0500

Why not A^[4]:= A^[3], A^[3]:=A^[2], A^[2]:=V?

________________________________

From: Marc Artzrouni "mailto:marc.artzrouni"
Sent: Tue 1/17/2006 8:52 AM
To: Mathcad Discussion List
Subject: [mathcad] How to fill a column of a matrix?

MathCad has several clever "vectorization-type" capabilities - but
there is one simple thing I can't find. Suppose
I have a 3 by 3 matrix A and I want to put in the second column some
other column vector V. how can I do that
in one fell swoop without having to write a silly loop? "Augment" and
"stack" don't help. It would be something like the submatrix function,
except that submatrix works only to extract a submatrix - not to write
into one. Using the same idea as submatrix
one could imagine a "submatrixin" function like

submatrixin(A, 1,3,2,2) = V that would put V in the second
col of A.

Could there be something like that in recent versions that I don't have
in MathCad2001i?
Many thanks
Marc Artzrouni

--
Marc Artzrouni
Département de Mathématiques (IPRA)
Université de Pau - BP 1155
64013 Pau Cedex
FRANCE

Home page/page perso:
http://www.univ-pau.fr/~artzroun/
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tel: + 33 - (0)5 59 40 75 50
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