[Numpy-discussion] Does Unreasonable Matrix Behavior affectScipy Sparse

Alan G Isaac aisaac@american....
Fri Apr 25 18:17:19 CDT 2008

>> 1. Please post a small example.  2. Do you have the very 
>> latest SVN (post r5084)? 

On Fri, 25 Apr 2008, Dinesh B Vadhia apparently wrote:
> I have a working program with b=Ax, where A is a large 
> sparse matrix.  However, I need the int8 support in the 
> sparse library to utilize much larger matrices.  I managed 
> to get hold of a numpy svn 5066 and scipy svn 4167 build, 
> and b=Ax now returns garbage results.  Nothing was changed 
> in the program except replacing getrow with .todense() and 
> I checked these to make sure the right rows were being 
> picked up. 

> Wish I could point out where exactly the problem lies but 
> there was no Traceback just the wrong results but it can 
> safely be assumed it is with the numpy/scipy matrix 
> support. 

You need to post a small example (actual code) that 
generates the error.  But first update NumPy from SVN and 
confirm that th problem still exists.

Alan Isaac

More information about the Numpy-discussion mailing list