[SciPy-dev] tagging 0.7rc1 this weekend?

josef.pktd@gmai... josef.pktd@gmai...
Wed Dec 3 14:23:55 CST 2008

On Wed, Dec 3, 2008 at 3:00 PM, Pauli Virtanen <pav@iki.fi> wrote:
> Mon, 01 Dec 2008 22:16:48 -0800, Jarrod Millman wrote:
>> I would like to get 0.7.0 out ASAP.  Is there any objection to tagging a
>> release candidate this weekend?  Are there any major regressions or
>> release blockers that I should be aware of?
> Maybe this should be resolved before the release (from the users list):
> Matthew Brett wrote:
>> > def ks_2samp(data1, data2):
>> >     """ Computes the Kolmogorov-Smirnof statistic on 2 samples.  Modified
>> >     from Numerical Recipies in C, page 493.  Returns KS D-value, prob.  Not
>> >     ufunc- like.
>> Wait - really?  We can't use Numerical Recipes code, it has strict and
>> incompatible licensing...  If it's in there it really has to come out as
>> fast as possible.
> According to svn log, the code for these functions originates from way
> back, r71 travo 2001-06-25 18:20:52. Apparently much of the module is
> written using NR as a reference, though I haven't checked if the code
> is similar.
> --
> Pauli Virtanen
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There is one more case in stats.stats:

def ttest_rel(a,b,axis=None):
    """Calculates the t-obtained T-test on TWO RELATED samples of scores, a
    and b.  From Numerical Recipies, p.483. Axis can equal None (ravel array
    first), or an integer (the axis over which to operate on a and b).

    Returns: t-value, two-tailed p-value

In both cases it is just a few lines, and I assume the overall
algorithm changed through the adjustment to numpy/scipy
I would just drop the reference to Numerical Recipies, the algorithm
should be pretty generic.

I haven't looked in these 2 cases, but for the one-sample ks-test, in
the ticket and in the newsgroup the discussion refered to the
numerical recipes. I never looked at NR, but the proposed correction
was exactly the same as in any reference that I found on the internet,
or in articles.


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