[SciPy-dev] Bug in scipy.stats.kde?

Dave Hirschfeld novin01@gmail....
Fri Oct 12 11:06:57 CDT 2007

Unless I'm mistaken it appears there's a bug in scipy.stats.kde as demonstrated
in the example below.

It appears that line 205 is referencing np (numpy) which has not been imported.
At the top of the file ravel has been imported from numpy so the solution
appears to be to simply remove the reference to np in the integrate_box_1d


Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)]
Type "copyright", "credits" or "license" for more information.

IPython 0.8.1 -- An enhanced Interactive Python.

In [1]: import scipy

In [2]: scipy.__version__
Out[2]: '0.7.0.dev3433'

In [3]: from scipy import randn, stats

In [4]: pdf = stats.kde.gaussian_kde(randn(1000))

In [5]: pdf.integrate_box_1d(-3,3)
<type 'exceptions.NameError'>             Traceback (most recent call last)

C:\development\sandbox\<ipython console> in <module>()

C:\Python25\Lib\site-packages\scipy\stats\kde.py in integrate_box_1d(self, low,
    203             raise ValueError("integrate_box_1d() only handles 1D pdfs")
--> 205         stdev = np.ravel(sqrt(self.covariance))[0]
    207         normalized_low = ravel((low - self.dataset)/stdev)

<type 'exceptions.NameError'>: global name 'np' is not defined

In [6]:

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