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Subject: repost problem of find function due to the misaligned text
Date: Sat, 28 May 2011 03:36:05 +0000 (UTC)
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Hello,

Thanks for the help!

However, in my case, I can not know which column I want. I can only know the index number [1;2;3] or [4;5;6].
The first three numbers in one column are actually coordinates. Therefore, I hope to find the data (e.g., 44) when I enter the coordinates (e.g., [1;2;3]).  Or, I hope to find the data (e.g., 44 and 74) when I enter the coordinates (e.g., [1;2;3] and [4;5;6]. Sorry that I did not make myself clearer.

Thanks!
Yihui

"someone" wrote in message <iror0g$ie3$1@newscl01ah.mathworks.com>...
> "Yihui" wrote in message <iroop9$bvf$1@newscl01ah.mathworks.com>...
> > Dear Matlab experts,
> > 
> > I have a problem with &#8220;find&#8221; function.
> > Assuming that I have a 4 x 3 data as follows: 
> > 1   4    7
> > 2   5    8
> > 3   6    9
> > 44  74  12
> > 
> > I would like to selectively output certain number by entering the numbers in the first three rows. For instance, I enter 
> > 1     4 
> > 2     3
> > 3     6
> > 
> > and then i can get 
> > 1    4 
> > 2    5
> > 3    6
> > 44   74
> > as output.
> > 
> > Could you please tell me how to do this? Thanks for any suggestions in advance.
> > Sincerely,
> > Yihui
> > 
> >                                                                     
> 
> % Its hard to determine exactly what you are trying do do.
> % From your example, why not simply:
> 
> >> A = [1 4 7;
> 2 5 8;
> 3 6 9;
> 44 74 12]
> 
> A =
> 
>      1     4     7
>      2     5     8
>      3     6     9
>     44    74    12
> 
> >> B = A(:,1:2)
> 
> B =
> 
>      1     4
>      2     5
>      3     6
>     44    74