[SciPy-User] scipy.stats.kendalltau bug?

Jeffrey zfyuan@mail.ustc.edu...
Sat Jul 28 11:48:17 CDT 2012


On 07/29/2012 12:23 AM, Jeffrey wrote:
> Dear all,
>
>     The sentences bellow will always raise an Error or Exception just 
> as follows, which is a little anomaly. Is this a bug?
>
>     >>> u1=numpy.random.rand(100000)
>     >>> u2=numpy.random.rand(100000)
>     >>> scipy.stats.kendalltau(u1,u2)
> --------------------------------------------------------------------------- 
>
> AttributeError                            Traceback (most recent call 
> last)
> /home/zfyuan/phd/paper1/pyvine_lap/<ipython-input-28-98f367090ed1> in 
> <module>()
> ----> 1 sp.stats.kendalltau(u1,u2)
>
> /usr/lib64/python2.7/site-packages/scipy/stats/stats.pyc in 
> kendalltau(x, y, initial_lexsort)
>    2673
>    2674     tau = ((tot - (v + u - t)) - 2.0 * exchanges) / \
> -> 2675                     np.sqrt((tot - u) * (tot - v))
>    2676
>    2677     # what follows reproduces the ending of Gary Strangman's 
> original
>
>
> AttributeError: sqrt
>

Sorry, I didn't describe this bug with details. What I mean is that when 
the two array have larger length, for example with length 100000, then 
it is more possible that the Error would occur.

My scipy version is 0.9.0 and numpy is 1.6.2.

Thanks a lot for your answering.

-- 

Jeffrey




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