[SciPy-user] What is fastest load/save matrix methods?

Dave Kuhlman dkuhlman at cutter.rexx.com
Tue Dec 20 13:22:29 CST 2005


On Mon, Dec 19, 2005 at 10:46:20PM -0800, Andrew Straw wrote:
> Cournapeau David wrote:

[snip]

> >Is there no way to convert numarray to scipy more directly than
> >going through list ? Concerning implementing scipy array support, what 
> >is the difference between scipy array and numarray ?
> >  
> >
> 
> With sufficiently recent versions of scipy, Numeric, and numarray,
> y=numstar.asarray(x) will create a view of the array with no copying,
> which is pretty fast.
> 
> "Sufficiently recent" means released within the last 2 months or so.

Thanks for helping me with this.

To give a little more information on what "Sufficiently recent"
means:

1. numarray-1.4.1 supports that numarray.asarray() function, but
   gives a warning message the first time it is called on a scipy
   array and produces a type error when used to pass a scipy
   array to PyTables.

2. numarray-1.5.0 works just fine.  It is available at:

       http://sourceforge.net/projects/numpy
       http://sourceforge.net/forum/forum.php?forum_id=518279

Dave

-- 
Dave Kuhlman
http://www.rexx.com/~dkuhlman



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