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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: [mg66333] Re: [mg66318] mirror image of a square matrix
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Wed, 10 May 2006 06:33:18 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

mat=Array[a,{4,3}];

Reverse/@mat == Transpose[Reverse[Transpose[mat]]]

True


Bob Hanlon

---- ravi <rv15i at yahoo.se> wrote: 
> 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
> 


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