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MathGroup Archive 1997

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Re: Joining matrices

  • To: mathgroup at smc.vnet.net
  • Subject: [mg5872] Re: [mg5738] Joining matrices
  • From: gielesen at imwsrv.imw.tu-clausthal.de (Harald Gielessen)
  • Date: Sun, 2 Feb 1997 01:31:16 -0500
  • Organization: IMW TU Clausthal
  • Sender: owner-wri-mathgroup at wolfram.com

In article <5cg600$t4r at smc.vnet.net>, Jean-Francois Alcover
<70763.411 at compuserve.com> wrote:

->i have to join 2 or more matrices line by line
->for example : joinmat[{{{1,2},{3,4}},{{10,20},{30,40}}}] 
->                 --> {{1,2,10,20},{3,4,30,40}}
->
->i have tried Transpose [Flatten[Transpose /@ ListOfMatrices,1]]
->but it seems rather slow
->
->can anyone help me with a faster solution ?

Try the package "MatrixManipulation". It prvides this and other functions
you might find useful though I can't tell you whether it is faster. It
should be at MathSource.

Harry

-- 
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Harald Gielessen, Institut fuer Maschinenwesen, TU Clausthal
Robert-Koch-Str. 32, D-38678 Clausthal-Zellerfeld, Germany
Phone: ++49 5323 72 2262, Fax: ++49 5323 72 3501
gielesen at imw.tu-clausthal.de http://www.imw.tu-clausthal.de/
------------------------------------------------------------
               "A man with one watch knows what time it is,
                a man with two watches is never sure..."
                    - Albert Einstein


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