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MathGroup Archive 2006

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Re: How to delete a row and a column in a matrix?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69712] Re: [mg69676] How to delete a row and a column in a matrix?
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Thu, 21 Sep 2006 07:30:29 -0400 (EDT)
  • Reply-to: hanlonr at cox.net

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

To delete row 2 and column 3

Drop[Drop[#,{3}]&/@m,{2}]

{{a[1, 1], a[1, 2], a[1, 4]}, {a[3, 1], a[3, 2], a[3, 4]}}

Drop[#,{3}]&/@Drop[m,{2}]

{{a[1, 1], a[1, 2], a[1, 4]}, {a[3, 1], a[3, 2], a[3, 4]}}


Bob Hanlon

---- "hussain.alqahtani at gmail.com" <hussain.alqahtani at gmail.com> wrote: 
> Dear
> 
> I am wondering how to delete a given row and column in a matrix in a
> single command.?
> 
> Your prompt reply is highly appreciated.
> 


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