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MathGroup Archive 2005

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Re: How to "search" in a matrix?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60917] Re: [mg60892] How to "search" in a matrix?
  • From: <bsyehuda at gmail.com>
  • Date: Mon, 3 Oct 2005 04:06:20 -0400 (EDT)
  • References: <200510020554.BAA01427@smc.vnet.net>
  • Reply-to: bsyehuda at gmail.com
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,
if t is you matrix of strings, you can simply use
First/@Position[t, TheStringYouAreLookingFor]
yehuda

On 10/2/05, Renan <renan.birck at gmail.com> wrote:
>
> I have this matrix:
>
> matr = {{a, b, 1}, {c, d, 2}, {e, f, 3}}
>
> I'm trying to do a "search" in a matrix. The "real" matrix will contain
> strings.
> How to "search" for a given value in a matrix and return all lines that
> have it?
>
> 'Select' seems to handle only lists - and this would require a
> Flatten, probably making my code too complicated and maybe slow (the
> real matrix will contain something like 100 elements - weather data).
>
> Thanks.
>
>



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