[pymvpa] Error running dissimilarity analysis

[Valentin Haenel]

Dear Micheal,

could you please post pymvpa version, operating system, and the script you are
using (if possible).

The sphere size might not be the issue, since the searchlight will have less
features at the edges of the brain, but its hard to tell from the error
message alone.

thanks.

V-

* Michael W. Cole <mwcole at gmail.com> [091213]:
> I am trying to run a searchlight analysis based on the searchlight_dsm.py
> example. I'm doing a 4-way classification with 2-voxel radius spheres.
> 
> It will run for a few spheres, then crash with this error:
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "pymvpa_script1.py", line 154, in <module>
>     sl_map = sl(blockavged_dataset)
>   File "/usr/lib64/python2.5/site-packages/mvpa/measures/base.py", line 105,
> in __call__
>     result = self._call(dataset)
>   File "/usr/lib64/python2.5/site-packages/mvpa/measures/searchlight.py",
> line 108, in _call
>     measure = self.__datameasure(sphere)
>   File "/usr/lib64/python2.5/site-packages/mvpa/measures/ds.py", line 47, in
> __call__
>     test_mat = N.asarray([in_vec, dset_vec])
>   File "/usr/lib64/python2.5/site-packages/numpy/core/numeric.py", line 230,
> in asarray
>     return array(a, dtype, copy=False, order=order)
> ValueError: setting an array element with a sequence.
> 
> I've found that the spheres that work have 1830 values each in in_vec and
> dset_vec, but the sphere it crashes on only has 1540 values. I'm not sure if
> this is related to the crash or not.
> 
> Any ideas on how to get around this error?
> 
> Thanks in advance!
> 
> Michael
> 
> 
> -- 
> Michael W. Cole, Ph.D.
> Post-doctoral researcher
> Cognitive Control & Psychopathology Lab
> Washington University in St. Louis

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