On 2010-01-19 11:00 AM, Robert Somerville wrote:
Hi;
i am having trouble trying to sort the rows of a 2 dimensional array by
the values in the first column .. does anybody know how or have an
example of how to do this ??? while leaving the remain columns remain
relative to the leading column
You will want to ask numpy questions on the numpy mailing list:
http://www.scipy.org/Mailing_Lists
from numpy import *
a=array( [ [4, 4, 3], [4, 5, 2], [3, 1, 1] ] )
i would like to generate the output (or get the output ...)
b = [ [3,1,1], [4,4,3], [4,5,2] ]
In [4]: import numpy as np
In [5]: a = np.array( [ [4, 4, 3], [4, 5, 2], [3, 1, 1] ] )
In [6]: i = a[:,0].argsort()
In [7]: b = a[i]
In [8]: b
Out[8]:
array([[3, 1, 1],
[4, 4, 3],
[4, 5, 2]])
--
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
--
http://mail.python.org/mailman/listinfo/python-list
