[SciPy-dev] St9bad_alloc

Maik Trömel mtroemel81@web...
Mon Jun 18 08:52:59 CDT 2007


Every point out of a convex hull arround the input data points gets the value nan. 
Try nwwert.max() . Do you get a result? 

Maik


> 
> Maik Trömel wrote:
> > Here is a small example:
> >
> > ################################
> >    from numpy import *
> >    from scipy import *
> >    from numpy.random import *
> >    from scipy.sandbox.delaunay import *
> >
> >    index_y= [] 
> >    index_x = [] 
> >    value = []
> >    for i in range(200):
> >       index_y.append(randint(10,2500))
> >       index_x.append(randint(10,2500))
> >       value.append(randint(-10,10))  
> >    
> >    nwyx = indices((2600, 2548))
> >    tri = Triangulation(index_y, index_x)
> >    interp = tri.nn_interpolator(value)
> >    nwwert = interp(nwyx[0], nwyx[1])
> >
> >    print  nwwert
> > ################################
> >
> >
> > If i split the funktion "interp()" into four sub-matrizes like  
> > ################################
> > nwwert = zeros((2600, 2548))
> > nwwert[0:1300, 0:1300] = interp(nwyx[0][0:1300, 0:1300], nwyx[1][0:1300, 0:1300])) 
> > nwwert[0:1300, 0:2548] = interp(nwyx[0][0:1300, 0:2548], nwyx[1][0:1300, 0:2548]))
> > ... 
> > ################################
> > the script crashes always at the same sub-matrix. Regardless in which order I process the sub-matrixes.
> >
> > Maik
> >
> >   
> >> Maik Trömel wrote:
> >>     
> >>> Hello List,
> >>>
> >>> I've got some problems with Scipy/sandbox/delaunay.
> >>> Everytime I run my script the following error occures:
> >>> terminate called after throwing an instance of 'std::bad_alloc'
> >>>   what():  St9bad_alloc
> >>>
> >>> Does anybody know what this means? And what I can do to avoid this error?
> >>>
> >>>       
> >> This means that dynamic allocation failed in some of the C++ code for 
> >> delaunay.
> >>     
> >>> I have postet in several forums, but nowbody could help me.
> >>>       
> >> Well, we would need more details: can you reproduce the problem on a 
> >> small, self contained example ?
> >>
> >> David
> >> _______________________________________________
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> >> Scipy-dev@scipy.org
> >> http://projects.scipy.org/mailman/listinfo/scipy-dev
> >>
> >>     
> >
> >
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> >   
> 
> I cannot reproduce the crash but
> python -i delaunay.py
> [[                           nan                            nan
>                              nan ...,                            nan
>                              nan                            nan]
>  [                           nan                            nan
>                              nan ...,                            nan
>                              nan                            nan]
>  [                           nan                            nan
>                              nan ...,                            nan
>                              nan                            nan]
>  ...,
>  [                           nan                            nan
>                              nan ...,                            nan
>                              nan                            nan]
>  [                           nan                            nan
>                              nan ...,                            nan
>                              nan                            nan]
>  [                           nan                            nan
>                              nan ...,                            nan
>                              nan                            nan]]
> 
> Nils
> 
> 
> 
> <hr>
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> 
> 


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