Re: A faster median (Wirth's method)
2010-12-01 03:22:00 GMT
I think last time I looked into how to apply a function along an axis I thought that the PyArray_IterAllButAxis would not work for that task (http://docs.scipy.org/doc/numpy/reference/c-api.array.html#PyArray_IterAllButAxis), but I think perhaps I misunderstood it. I'm looking into how to use it.
On Tue, Nov 30, 2010 at 11:58 AM, Matthew Brett <matthew.brett <at> gmail.com> wrote:Oh, that's nice! I'm using 0.11.2. OK, time to upgrade.
> On Tue, Nov 30, 2010 at 11:35 AM, Keith Goodman <kwgoodman <at> gmail.com> wrote:
>> On Tue, Nov 30, 2010 at 11:25 AM, John Salvatier
>> <jsalvati <at> u.washington.edu> wrote:
>>> I am very interested in this result. I have wanted to know how to do an
>> My first thought was to write the reducing function like this
>> cdef np.float64_t namean(np.ndarray[np.float64_t, ndim=1] a):
>> but cython doesn't allow np.ndarray in a cdef.
> Sorry for the ill-considered hasty reply, but do you mean that this:
> import numpy as np
> cimport numpy as cnp
> cdef cnp.float64_t namean(cnp.ndarray[cnp.float64_t, ndim=1] a):
> return np.nanmean(a) # just a placeholder
> is not allowed? It works for me. Is it a cython version thing?
> (I've got 0.13),
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