[Numpy-discussion] Precision/value change moving from C to Python

2013-11-12 Thread Bart Baker
Hi all, First time posting. I've been working on a class for solving a group of affine models and decided to drop down to C for a portion of the code for improved performance. There are two questions that I've had come up from this. 1) I've written the section of code, which involved a series

Re: [Numpy-discussion] Precision/value change moving from C to Python

2013-11-12 Thread Daπid
On 12 November 2013 12:01, Bart Baker bart...@gmail.com wrote: The issue is that there are some minor (10^-16) differences in the values when I do the calculation in C vs Python. That is the order of the machine epsilon for double, that looks like roundoff errors to me. I found similar

Re: [Numpy-discussion] Caution about using intrisincs, and other 'advanced' optimizations

2013-11-12 Thread Julian Taylor
On 12.11.2013 03:17, David Cournapeau wrote: Hi there, I have noticed more and more subtle and hard to track serious bugs in numpy and scipy, due to the use of advanced optimization features (flags, or gcc intrinsics). I am wondering whether those are worth it: they compile wrongly under

Re: [Numpy-discussion] Numpy 1.9 release date

2013-11-12 Thread Chris Barker
On Sun, Nov 10, 2013 at 7:27 PM, Stéfan van der Walt ste...@sun.ac.zawrote: that the main thing missing at this point is fixing the datetime problems. What needs to be done, and what is the plan forward? I'm not sure that's quite been decided, but my take: 1) remove the existing time zone

Re: [Numpy-discussion] ANN: NumPy 1.7.2rc1 release

2013-11-12 Thread Derek Homeier
Hi, On 03.11.2013, at 5:42PM, Julian Taylor jtaylor.deb...@googlemail.com wrote: I'm happy to announce the release candidate of Numpy 1.7.2. This is a bugfix only release supporting Python 2.4 - 2.7 and 3.1 - 3.3. on OS X 10.5, build and tests succeed for Python 2.5-3.3, but Python 2.4.4

Re: [Numpy-discussion] ANN: NumPy 1.7.2rc1 release

2013-11-12 Thread Christian K.
Am 10.11.13 23:27, schrieb Charles R Harris: On Sun, Nov 10, 2013 at 5:12 PM, Christian K. ckk...@hoc.net mailto:ckk...@hoc.net wrote: Am 10.11.13 21:06, schrieb Christian K.: Am 03.11.13 13:42, schrieb Julian Taylor: Hi all, I'm happy to announce the release

Re: [Numpy-discussion] ANN: NumPy 1.7.2rc1 release

2013-11-12 Thread Charles R Harris
On Tue, Nov 12, 2013 at 2:38 PM, Derek Homeier de...@astro.physik.uni-goettingen.de wrote: Hi, On 03.11.2013, at 5:42PM, Julian Taylor jtaylor.deb...@googlemail.com wrote: I'm happy to announce the release candidate of Numpy 1.7.2. This is a bugfix only release supporting Python 2.4 -

Re: [Numpy-discussion] Precision/value change moving from C to Python

2013-11-12 Thread Bart Baker
The issue is that there are some minor (10^-16) differences in the values when I do the calculation in C vs Python.  That is the order of the machine epsilon for double, that looks like roundoff errors to me. Hi Daπid, Thanks for the reply. That does make sense. I'm trying to my

Re: [Numpy-discussion] ANN: NumPy 1.7.2rc1 release

2013-11-12 Thread Charles R Harris
On Tue, Nov 12, 2013 at 4:24 PM, Charles R Harris charlesr.har...@gmail.com wrote: On Tue, Nov 12, 2013 at 2:38 PM, Derek Homeier de...@astro.physik.uni-goettingen.de wrote: Hi, On 03.11.2013, at 5:42PM, Julian Taylor jtaylor.deb...@googlemail.com wrote: I'm happy to announce the

Re: [Numpy-discussion] mingw-w64 and openblas test

2013-11-12 Thread Carl Kleffner
Hi, yes it also works for scipy. I didn't patch the scipy source other than creating site.cfg with the path to openblas.I will upload the binaries and logs later today. Regards Carl scipy.test(verbose=2) runs without segfault: ...