Sorting array

[Tartifola]

Hi,

On Fri, 30 Nov 2007 14:55:08 -0600
Robert Kern <robert.kern at gmail.com> wrote:

> Tartifola wrote:
> > 
> > Hi,
> > I'm working with numerical array and I'm a little lost on a particular
> > sorting of one of them. In particular I have an array like
> > 
> > a = array([[8,4,1],[2,0,9]])
> > 
> > and I need to sort it using only the first column as reference but
> > keeping the lines together so to obtain
> > 
> > array([[2, 0, 9],
> >        [8, 4, 1]])
> 
> In [1]: from numpy import *
> 
> In [2]: a = array([[8,4,1],[2,0,9]])
> 
> In [3]: i = argsort(a[:,0])
> 
> In [4]: a[i]
> Out[4]:
> array([[2, 0, 9],
>        [8, 4, 1]])
> 
> 
> numpy questions are best asked on the numpy-discussion mailing list since
> everyone there automatically knows that you are talking about numpy arrays and
> not just misnaming lists.  ;-)
> 
>   http://www.scipy.org/Mailing_Lists
> 

thanks a lot for your help and sorry for using the wrong list.


> -- 
> Robert Kern
> 
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco
>