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MathGroup Archive 2006

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Re: mirror image of a square matrix

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66331] Re: mirror image of a square matrix
  • From: Peter Pein <petsie at dordos.net>
  • Date: Wed, 10 May 2006 06:33:14 -0400 (EDT)
  • References: <e3pean$ief$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

ravi schrieb:
> Let me define the mirror image of a matrix as the operation of flipping
> the columns such that the last column becomes the first, the second
> last becomes the second and so on. I would like to know if this can be
> done simpler than as follows:
> 
> mat=Table[Random[],{n},{n}]
> matR=Transpose[Reverse[Transpose[mat]]]
> Are there any built in functions for operations like these?
> /ravi
> 
Hi ravi,

in the moment I don't see anything more simple than

matR=Map[Reverse,mat]

(or slightly shorter: matR= Reverse /@ mat)

Peter


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