[SciPy-dev] sparse revisited

Nils Wagner nwagner at iam.uni-stuttgart.de
Wed Jan 31 02:59:22 CST 2007


Nathan Bell wrote:
> On 1/30/07, Nils Wagner <nwagner at iam.uni-stuttgart.de> wrote:
>   
>> I have applied the patch by mauger for ticket #311.
>> It works fine. I mean our tests passed. Please can you
>> apply the patch to svn.
>>     
>
> I'll give it a try tomorrow.
>
>   
>> How about the other issues concerning sparse ?
>> I look forward to hearing from you.
>>     
>
> Concerning your UMFPACK_ERROR_out_of_memory errors, are you sure that
> the factors actually fit in memory?  You could try it in MATLAB (which
> also uses UMFPACK) to eliminate this possibility.  Without more
> guidance it's difficult to say what the issue could be.  UMFPACK
> should detect malformed matrices, so I doubt it's a format issue.
>
>
>   
The problem is that I didn't get an UMFPACK_out_of_memory error with r2450.
Hence my conclusion is that the recent changes to sparse are responsible
for the problem.

Nils

P.S. Nathan, I will upload the test including the large input matrices
on our webpage
and send you the login data off-list.
 
> Also, will someone who knows the implementation of lil_matrix fix
> http://projects.scipy.org/scipy/scipy/ticket/347 or at least roll back
> the recent changes (assuming they are the culprit)?
>
>
>   
 


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