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

[mathcad] SV: RE: How to fill a column of a matrix?
Author: Gundermann, Jesper Posted: Wed, 18 Jan 2006 12:06:12 +0100
About replacing a column: use the upper index <> (in the matrix palette) Fra: Pergande, Albert N "mailto:albert.n.pergande" Sendt: 17. januar 2006 16:16 Til: Mathcad Discussion List Emne: [mathcad] RE: How to fill a column of a matrix? I'd make a loop from 0 to rows-1, and write A[col, I := data[I You've hit on the problem that makes arrays of arrays useless in faking multidimensional arrays - you can't replace a single element inside that structure... Al Pergande Senior Radar Engineer Lockheed Martin Missiles and Fire Control MP 200 5600 Sandlake Road Orlando, Fl 32819 Voice 407-356-5169 Fax 407-356-0933 "albert.n.pergande" for personal mail - "al" From: Marc Artzrouni "mailto:marc.artzrouni" Sent: Tuesday, January 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/ ******************************** tel: + 33 - (0)5 59 40 75 50 fax: + 33 - (0)5 59 40 75 55 e-mail: "marc.artzrouni" ********************************
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