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

Author: Oakley, Philip SELEX UK Posted: Tue, 17 Jan 2006 16:08:04 +0000

Ultra easy (once you know how! ;)
if a=3x3, b=3x1 matrix/vector

a<1>:=b [i.e. type" a ctrl-6 1 : b enter"]
This assigns b to column 1 of a

Philip

From: Marc Artzrouni "mailto:marc.artzrouni"
Sent: 17 January 2006 13:52
To: Mathcad Discussion List
Subject: [mathcad] How to fill a column of a matrix?

*** WARNING ***

This mail has originated outside your organization,
either from an external partner or the Global Internet.
Keep this in mind if you answer this message.

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"
**********************************

********************************************************************
This email and any attachments are confidential to the intended
recipient and may also be privileged. If you are not the intended
recipient please delete it from your system and notify the sender.
You should not copy it or use it for any purpose nor disclose or
distribute its contents to any other person.
********************************************************************

[View Complete Thread]

Previous by date: [mathcad] Re: DSP method, Quang-Viet Nguyen
Next by date: [mathcad] Re: How to fill a column of a matrix?, Stuart Bruff
Previous thread: [mathcad] Re: Help with creating a vector, Stuart Bruff
Next thread: [mathcad] RE: How to fill a column of a matrix?, Oakley, Philip SELEX UK

Ready to buy?

Mathcad: single user licence

Add to shopping basket

$ 1,195.00

Upgrade to Mathcad 14 from version 12 or 13

Add to shopping basket

$ 325.00

Upgrade to Mathcad 14 from version 11, 2001i, 2001 or 2000

Add to shopping basket

$ 425.00

Featured Downloads

Mathcad 14 demo

Mathcad 14 Brochure

Mathcad or Excel?

Mathcad Customer Story: Man B&W Diesel

Mathcad Customer Story: Stork Fokker Aerospace

Mathcad White Paper - Moving beyond the limitations of spreadsheets

Product Reviews

"Our work ranges from complex medical imaging research to large-scale mapping and diagrams and we need a tool that is able to handle anything we investigate. With Mathcad, we are able to manipulate and analyse our data quickly while at the same time documenting our work, for sharing and publication. We also use it for pilot studies conducted in support of research grant applications. It is an end-to-end tool for research and development."
Dr. Kenneth Castleman, President of Advanced Digital Imaging Research (ADIR), Houston, Texas

"Mathcad is an integral product for my work... With Mathcad, itís easy to disseminate design calculations because the documents look like real math. Thereís very little I canít do in Mathcad. The main benefits come from the format, which resemble a typed set of calculations. These programs are easier to develop by engineers and easier for others to follow and review since the logic is expressed in a familiar manner. The format is what places Mathcad head and shoulders above other programs of a similar function."
Andre Pavlov, Structural Engineer, Florida Department of Transportation