On Thu, 2003-12-25 at 03:27, Nadav Horesh wrote:
The conversion for a list of large arrays into a matrix is very slow in numarray while reasonably fast:
from numarray import * a = [arange(200000), arange(200000), arange(200000), arange(200000)] aa = array(a) # Very slow
--------------------------------
from Numeric import * a = [arange(200000), arange(200000), arange(200000), arange(200000)] aa = array(a) # Fast
Python version: 2.3.3 numarray version: Official 0.8
Tested under WinXP and RH9 linux.
Any workaround?
Try concatenate. For the array sizes you're looking at, numarray does OK. You may have to adjust the result shape. Todd
Nadav
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