[Numpy-discussion] Strange problem

Uwe Schmitt uschmitt@mineway...
Fri Jun 29 04:09:17 CDT 2012


Am 29.06.2012 10:57, schrieb David Cournapeau:
>
> Is this on 32 or 64 bits windows ? Do you know if your customer uses
> only numpy, or other packages that depend on numpy C extension ?

It is 64 bit Windows.
I forgot to say that a part of my numpy arrays are generated by a short
Cython method wrapping open-ms library.

As the code fragment is short, I post it here:

    def get_peaks(self):

         cdef _MSSpectrum[_Peak1D] * spec_ = self.inst

         cdef unsigned int n = spec_.size()
         cdef np.ndarray[np.float32_t, ndim=2] peaks
         peaks = np.zeros( [n,2], dtype=np.float32)
         cdef _Peak1D p

         cdef vector[_Peak1D].iterator it = spec_.begin()
         cdef int i = 0
         while it != spec_.end():
             peaks[i,0] = deref(it).getMZ()
             peaks[i,1] = deref(it).getIntensity()
             preincrement(it)
             i += 1

         return peaks

I am sure that this functions does not crash during execution.
As spec_ 's class is derived from C++ STL std::vector<..> there should
be no conflict between counting 'i' up to 'n' and testing 'it'
against 'spec_.end()'.

Regards, Uwe



-- 
Dr. rer. nat. Uwe Schmitt
Leitung F/E Mathematik

mineway GmbH
Gebäude 4
Im Helmerswald 2
66121 Saarbrücken

Telefon: +49 (0)681 8390 5334
Telefax: +49 (0)681 830 4376

uschmitt@mineway.de
www.mineway.de

Geschäftsführung: Dr.-Ing. Mathias Bauer
Amtsgericht Saarbrücken HRB 12339





-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.scipy.org/pipermail/numpy-discussion/attachments/20120629/d9630358/attachment-0001.html 


More information about the NumPy-Discussion mailing list