From: Meino Christian Cramer <Meino.Cramer@...>
Date: 2006-06-23T11:44:14+09:00
Subject: Re: Multidimensional ".index" ?

From: ara.t.howard@noaa.gov
Subject: Re: Multidimensional ".index" ?
Date: Fri, 23 Jun 2006 11:35:10 +0900

> On Fri, 23 Jun 2006, Meino Christian Cramer wrote:
> 
> > Hi,
> >
> > a=[1,2,3,4]
> > a.index(3)  -> 2
> >
> > Is there any way to do such things:
> >
> > a=[[1,2,3,4],[5,6,7,8],[9,10,11,12]]
> >
> > a.index(6)  -> [1,1]
> >
> >
> > may be for n-dimensional arrays, too ?
> >
> > Thank you very much for any helpful reply in advance !
> >
> > Keep ruby!
> > mcc
> 
>    harp:~ > cat a.rb
>    require 'narray'
> 
>    na = NArray.to_na [
>          [1,2,3,4],
>          [5,6,7,8],
>          [9,10,11,12]
>         ]
> 
>    idx = na.eq 7
>    p idx
>    p na[idx]
> 
>    idx = na.eq(7).or(na.eq(12))
>    p idx
>    p na[idx]
> 
>    idx = na.gt 6
>    p idx
>    p na[idx]
> 
> 
> 
>    harp:~ > ruby a.rb
>    NArray.byte(4,3):
>    [ [ 0, 0, 0, 0 ],
>      [ 0, 0, 1, 0 ],
>      [ 0, 0, 0, 0 ] ]
>    NArray.int(1):
>    [ 7 ]
>    NArray.byte(4,3):
>    [ [ 0, 0, 0, 0 ],
>      [ 0, 0, 1, 0 ],
>      [ 0, 0, 0, 1 ] ]
>    NArray.int(2):
>    [ 7, 12 ]
>    NArray.byte(4,3):
>    [ [ 0, 0, 0, 0 ],
>      [ 0, 0, 1, 1 ],
>      [ 1, 1, 1, 1 ] ]
>    NArray.int(6):
>    [ 7, 8, 9, 10, 11, 12 ]
> 
> 
> and so much more.  it's all on rubyforge.
> 
> -a
> -- 
> suffering increases your inner strength.  also, the wishing for suffering
> makes the suffering disappear.
> - h.h. the 14th dali lama
> 



THANK YOU! :))

Have a nice weekend!
mcc