[Numpy-discussion] Segfault when using scipy.special.hermite?

2009-10-28 Thread Ole Streicher
Hi, Is there something wrong with scipy.special.hermite? The following code produces glibc errors: 8--- import scipy.special h = [] for i in xrange(15): print i h.append(scipy.special.hermite(i+1)) 8--- results in ... 12

Re: [Numpy-discussion] Using matplotlib's prctile on masked arrays

2009-10-28 Thread Gökhan Sever
On Tue, Oct 27, 2009 at 8:25 AM, josef.p...@gmail.com wrote: This should not be the correct results if you use scipy.stats.scoreatpercentile, it doesn't have correct missing value handling, it treats nans or mask/fill values as regular numbers sorted to the end.

Re: [Numpy-discussion] Using matplotlib's prctile on masked arrays

2009-10-28 Thread Gökhan Sever
On Tue, Oct 27, 2009 at 12:23 PM, Pierre GM pgmdevl...@gmail.com wrote: On Oct 27, 2009, at 7:56 AM, Gökhan Sever wrote: Unfortunately, matplotlib.mlab's prctile cannot handle this division: Actually, the division's OK, it's mlab.prctile which is borked. It uses the length of the input

Re: [Numpy-discussion] Using matplotlib's prctile on masked arrays

2009-10-28 Thread josef . pktd
On Wed, Oct 28, 2009 at 9:52 AM, Gökhan Sever gokhanse...@gmail.com wrote: On Tue, Oct 27, 2009 at 12:23 PM, Pierre GM pgmdevl...@gmail.com wrote: On Oct 27, 2009, at 7:56 AM, Gökhan Sever wrote: Unfortunately, matplotlib.mlab's prctile cannot handle this division: Actually, the

[Numpy-discussion] reading gzip compressed files using numpy.fromfile

2009-10-28 Thread Peter Schmidtke
Dear Numpy Mailing List Readers, I have a quite simple problem, for what I did not find a solution for now. I have a gzipped file lying around that has some numbers stored in it and I want to read them into a numpy array as fast as possible but only a bunch of data at a time. So I would like to

Re: [Numpy-discussion] reading gzip compressed files using numpy.fromfile

2009-10-28 Thread Robert Kern
On Wed, Oct 28, 2009 at 14:31, Peter Schmidtke pschmid...@mmb.pcb.ub.es wrote: Dear Numpy Mailing List Readers, I have a quite simple problem, for what I did not find a solution for now. I have a gzipped file lying around that has some numbers stored in it and I want to read them into a numpy

Re: [Numpy-discussion] reading gzip compressed files using numpy.fromfile

2009-10-28 Thread Christopher Barker
Robert Kern wrote: f=gzip.open( myfile.gz, r ) xyz=npy.fromfile(f,dtype=float32,count=400) Read in reasonably-sized chunks of bytes at a time, and use np.fromstring() to create arrays from them. Something like: count = 400 xyz = np.fromstring(f.read(count*4), dtype=np.float32)

Re: [Numpy-discussion] Segfault when using scipy.special.hermite?

2009-10-28 Thread Chris Colbert
that code works fine for me: ubuntu 9.04 x64 python 2.6.2 scipy 0.7.1 numpy 1.3.0 ipython 0.9.1 On Wed, Oct 28, 2009 at 2:21 PM, Ole Streicher ole-usenet-s...@gmx.net wrote: Hi, Is there something wrong with scipy.special.hermite? The following code produces glibc errors:

Re: [Numpy-discussion] Segfault when using scipy.special.hermite?

2009-10-28 Thread Pauli Virtanen
ke, 2009-10-28 kello 14:21 +0100, Ole Streicher kirjoitti: Is there something wrong with scipy.special.hermite? The following code produces glibc errors: It's probably this issue: http://projects.scipy.org/numpy/ticket/1211 The most likely cause is that the linear algebra libraries

[Numpy-discussion] Numpy/Scipy for EC2

2009-10-28 Thread Dan Yamins
Hi all: I'm gearing up to build an Amazon Machine Instance (AMI) for use in doing Numpy/Scipy computations on the Amazon EC2 cloud. I'm writing to ask if anyone has any advice for which (if any) publicly available AMI I should start with. If any one has any specific AMI's that they think are