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From: "zedong 
" <zdongwu@gmail.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Is there any non loop implement to find the index of a vector  in the matrix?
Date: Sun, 14 Dec 2008 15:53:02 +0000 (UTC)
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" <zdongwu@gmail.com>
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"us " <us@neurol.unizh.ch> wrote in message <gi388u$ed0$1@fred.mathworks.com>...
> "zedong"
> > Is there any non loop implement to find the index of a vector  in the matrix?
> > for example:
> > a=[1 2]
> > b=[4 5;6 7;8 7;1 2;2 3]
> > I want to return  4
> 
> one of the solutions
> 
> % the data
>      a=[
>           1,2 % <- pos 4
>           4,5 % <- pos 1
>      ];
>      b=[4 5;6 7;8 7;1 2;2 3];
> % the engine
>      [ix,ix]=ismember(a,b,'rows');
> % the result
>      ix
> %{
>      ix =
>           4
>           1
> %}
> 
> us


Thank you very much.you have done a wonderful work.Thank you