[SciPy-user] amd64 specific error in fitpack spline interpolation
willemjagter at gmail.com
Tue Sep 5 01:34:56 CDT 2006
Said I'd reply... Works fine on my machine.
On 30/08/06, George Nurser <agn at noc.soton.ac.uk> wrote:
> 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
> 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
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