[SciPy-user] amd64 specific error in fitpack spline interpolation
George Nurser
agn at noc.soton.ac.uk
Wed Aug 30 07:22:04 EDT 2006
On 30 Aug 2006, at 11:00, Angus McMorland wrote:
> Hi all,
>
> I posted about this problem a few months ago, but we didn't get very
> far, but the annoyance level of the problem is enough now for me to
> have
> another go.
>
> I'm trying to run the spline example from the cookbook (my exact code,
> called spl.py, is inlined below). On an ix86 computer this works fine,
> and returns the expected graphs, but on an amd64 machine I get the
> error
> below. Both computers are running debian etch, with recent svn
> numpy and
> scipy.
>
> TypeError: array cannot be safely cast to required type
>> /usr/lib/python2.4/site-packages/scipy/interpolate/fitpack.py(217)
>> splprep()
> 216
> t,c,o=_fitpack._parcur(ravel(transpose(x)),w,u,ub,ue,k,task,ipar,s,t,
> --> 217 nest,wrk,iwrk,per)
> 218 _parcur_cache['u']=o['u']
>
> I believe the error is generated by the _parcur call -> once in pdb,
> calling it again re-raises the same error.
>
> ipdb>_fitpack._parcur(ravel(transpose(x)),w,u,ub,ue,k,task,ipar,s,t,
> nest,wrk,iwrk,per)
Same problem on our Opterons.
numpy v 2631
scipy v 1614
built & linked to acml
[8]nohow@/noc/users/agn/python> python amdtest.py
Traceback (most recent call last):
File "amdtest.py", line 23, in ?
tckp,u = splprep([x,y,z],s=s,k=k,nest=-1)
File "/data/jrd/mod1/agn/ext/Linux/lib64/python2.3/site-packages/
scipy/interpolate/fitpack.py", line 217, in splprep
TypeError: array cannot be safely cast to required type
-George.
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