[SciPy-Dev] replacing integrate.cumtrapz with numpy.trapz

Ralf Gommers ralf.gommers@googlemail....
Sat Jul 17 08:38:42 CDT 2010


On Sat, Jul 17, 2010 at 8:57 PM, Charles R Harris <charlesr.harris@gmail.com
> wrote:

>
>
> On Sat, Jul 17, 2010 at 2:42 AM, Ralf Gommers <ralf.gommers@googlemail.com
> > wrote:
>
>> integrate.cumtrapz and numpy.trapz do exactly the same thing and the code
>> is very similar but not identical, as pointed out in
>> http://projects.scipy.org/scipy/ticket/720. Assuming numpy.trapz is not
>> going anywhere, can we replace the scipy version with it?
>>
>> For a small bonus, the numpy version is about 10% faster (tested for
>> several array shapes):
>> >>> a = np.arange(1e4).reshape(500, 20)
>> >>> %timeit np.trapz(a, axis=1)
>> 10000 loops, best of 3: 182 us per loop
>> >>> %timeit sp.integrate.cumtrapz(a, axis=1)
>> 1000 loops, best of 3: 209 us per loop
>>
>>
> Replacement seems reasonable to me. We should try to prune duplicate
> functionality with numpy taking precedence.
>
> Just to double check, that also means deprecating the name cumtrapz right?

Ralf
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