[SciPy-User] KDTree IndexError

Oleksandr Huziy guziy.sasha@gmail....
Fri Jul 20 12:02:33 CDT 2012


Hi,

is it possible to have x2,y2,z2 to test it?

Thanks
--
Oleksandr Huziy

2012/7/20 <DParker@chromalloy.com>

> I'm using scipy.spatial.KDTree (version 0.10.1) to perform nearest
> neighbor interpolation. Recently I've encountered an error when defining a
> KDTree from certain sets of data. I have not been able to determine what is
> unique about these data sets and the traceback doesn't provide much of a
> clue to me. I was hoping someone might be familiar with the problem and
> provide some insight into what is causing the failure, what to look for in
> my data set, and how to avoid the failure.
>
> The code which generates the traceback is:
> tree = KDTree(zip(x2,y2,z2))
>
> where x2, y2, and z2 are numpy arrays dtype float64. For one particular
> data set which fails these have a length of 157,237, shape is (157237,).
>
>
> As I said above I don't know what is unusual about the data that causes
> the failure to occur. The traceback is copied below:
>
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
>   File "<input>", line 75, in interactivemode
>   File "C:\Python26\lib\site-packages\fluenttools\profile.py", line 740,
> in commonnodes
>     tree = KDTree(zip(x2,y2,z2))
>   File "C:\Python26\lib\site-packages\scipy\spatial\kdtree.py", line 174,
> in __init__
>     self.tree = self.__build(np.arange(self.n), self.maxes, self.mins)
>   File "C:\Python26\lib\site-packages\scipy\spatial\kdtree.py", line 238,
> in __build
>     self.__build(idx[less_idx],lessmaxes,mins),
>
> {Prior two lines repeated 974 times}
>
>   File "C:\Python26\lib\site-packages\scipy\spatial\kdtree.py", line 201,
> in __build
>     data = self.data[idx]
> IndexError: index must be either an int or a sequence
>
> David G. Parker
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>
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