umfpack error

[Johannes Schönberger]

Are you sure you have SWIG installed?

Am 04.10.2013 um 12:49 schrieb Juan Nunez-Iglesias <jni.soma at gmail.com>:

> Just for future reference, and because it wasn't immediately obvious from googling: the umfpack headers in Ubuntu 13.04 are in the package libsuitesparse-dev.
> 
> But now the scipy build fails with some weird error. Hmmm.
> 
> building extension "scipy.sparse.linalg.dsolve.umfpack.__umfpack" sources
> 
> creating build/src.linux-x86_64-2.7/scipy/sparse/linalg/dsolve
> 
> creating build/src.linux-x86_64-2.7/scipy/sparse/linalg/dsolve/umfpack
> 
>   adding 'scipy/sparse/linalg/dsolve/umfpack/umfpack.i' to sources.
> 
> swig: scipy/sparse/linalg/dsolve/umfpack/umfpack.i
> 
> swig -python -I/usr/include/suitesparse -I/usr/include/suitesparse -I/usr/include/suitesparse -o build/src.linux-x86_64-2.7/scipy/sparse/linalg/dsolve/umfpack/_umfpack_wrap.c -outdir build/src.linux-x86_64-2.7/scipy/sparse/linalg/dsolve/umfpack scipy/sparse/linalg/dsolve/umfpack/umfpack.i
> 
> unable to execute swig: No such file or directory
> 
> error: command 'swig' failed with exit status 1
> 
> 
> 
> 
> On Fri, Oct 4, 2013 at 2:39 PM, Juan Nunez-Iglesias <jni.soma at gmail.com> wrote:
> Thanks Josh for the detailed response and discussion! I think you're absolutely right that it should be suppressed if pyamg is available. And it's probably worth getting that in before the release. Happy to tackle this.
> 
> Juan.
> 
> PS: I'm mostly on OSX, with some Linux on the side. =)
> 
> 
> On Fri, Oct 4, 2013 at 9:17 AM, Josh Warner <silvertrumpet999 at gmail.com> wrote:
> Final note - umfpack enables mode='cg' in random_walker, which is better than brute force but not the fastest or most efficient mode. The multi-grid preconditioned conjugate gradient method is: mode='cg_mg'. This is enabled by pyamg, which is independent of umfpack and is considerably easier to install and use than the method I just described.
> 
> Come to think of it, we probably should suppress that warning if import pyamg works. It incorrectly implies the user doesn't have the fastest mode available.
> 
> On Thursday, October 3, 2013 1:21:43 AM UTC-5, Juan Nunez-Iglesias wrote:
> 
> 
> 
> Hi guys,
> 
> How do I build scipy with umfpack to silence this error:
> 
> Exception AttributeError: "'UmfpackContext' object has no attribute '_symbolic'" in <bound method UmfpackContext.__del__ of <scipy.sparse.linalg.dsolve.umfpack.umfpack.UmfpackContext object at 0x101b62050>> ignored
> and speed up random_walker? I've just been doing a pip install scipy till now.
> 
> Juan.
> 
> 
> 
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