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

Charles R Harris charlesr.harris@gmail....
Sat Jul 17 07:57:18 CDT 2010


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.

Chuck
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