[Numpy-discussion] Error in choose (bug?)
Todd Miller
jmiller at stsci.edu
Thu May 13 09:58:07 CDT 2004
On Thu, 2004-05-13 at 07:13, Álvaro Tejero Cantero wrote:
> I have a matrix of particle collision times: times[i,j] gives the time
> for particle "i" to collide with particle "j".
>
> If I do, in order to get the first expected collision time for each
> particle, the following (random array for testing purposes) :
>
> >>> N=30
> >>> times = rnd.random([N,N])
> >>> choose(argmin(times,transpose(times))
> Segmentation fault (of the python interactive shell!!!)
>
> With N=100 I get a more informative traceback, and rest within the
> shell:
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> File "/usr/lib/python2.3/site-packages/numarray/ufunc.py", line 1670, in choose
> return _choose(selector, population, outarr, clipmode)
> File "/usr/lib/python2.3/site-packages/numarray/ufunc.py", line 1579, in __call__
> result = self._doit(computation_mode, woutarr, cfunc, ufargs, 0)
> File "/usr/lib/python2.3/site-packages/numarray/ufunc.py", line 1564, in _doit
> blockingparameters)
> ValueError: _operator_compute: too many inputs + outputs
>
>
> For N=10,N=15 I get the expected output, but for N=20 I get again the
> brutal segfault...
>
>
> regards,
> á.
I was able to reproduce this bug, logged it on Source Forge, and will
get to it as soon as possible... probably tomorrow or Monday.
Regards,
Todd
More information about the Numpy-discussion
mailing list