Hi, On Sat, Jul 28, 2012 at 7:48 PM, Jeffrey <zfyuan@mail.ustc.edu.cn> wrote:
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.
I can confirm this, like In []: os.sys.version Out[]: '2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)]' In []: np.version.version Out[]: '1.6.0' In []: sp.version.version Out[]: '0.9.0' In []: stats.kendalltau(rand(77929), rand(77929)) Out[]: (0.0060807135427758865, 0.010891543687108114) In []: stats.kendalltau(rand(77939), rand(77939)) ------------------------------------------------------------ Traceback (most recent call last): File "<ipython console>", line 1, in <module> File "C:\Python27\lib\site-packages\scipy\stats\stats.py", line 2675, in kendalltau np.sqrt((tot - u) * (tot - v)) AttributeError: sqrt There really seems to be odd problem above a certain length of arrays. My 2 cents, -eat
--
Jeffrey
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