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

Author: Andy Spragg Posted: Tue, 17 Jan 2006 16:20:12 +0000

Unless I misunderstand the question .... Ctrl-6 inserts a column index
placeholder (angle brackets). Been there since v6 (the version at which
when I started using Mathcad). So define A, then use Ctrl-6 to say A<2> =
V. Andy

Marc Artzrouni "marc.artzrouni"
17/01/2006 13:52
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[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

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

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