Mailman 3 April 2005 - NumPy-Discussion

ANN: numarray-1.3.1
by Todd Miller April 21, 2005

April 21, 2005

Release Notes for numarray-1.3.1 Numarray is an array processing package designed to efficiently manipulate large multi-dimensional arrays. Numarray is modelled after Numeric and features c-code generated from python template scripts, the capacity to operate directly on arrays in files, arrays of heterogeneous records, string arrays, and in-place operation on memory mapped files. I. ENHANCEMENTS None. 1.3.1 fixes the problem with gcc-3.4.3 II. BUGS FIXED / CLOSED 1152323 /usr/include/fenv.h:96: error: conflicting types for 'fegete 1185024 numarray-1.2.3 fails to compile with gcc-3.4.3 1187162 Numarray 1.3.0 installation failure See http://sourceforge.net/tracker/?atid=450446&group_id=1369&func=browse for more details.

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Numeric 24.0
by Travis Oliphant April 20, 2005

April 20, 2005

I've released Numeric 24.0 as a beta (2nd version) release. Right now it's just a tar file. Please find any bugs. I'll wait a week or two and release a final version unless I hear reports of problems. Thanks to those who have found bugs already. David Cooke has been especially active in helping fix problems. Many kudos to him. -Travis

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Installing Numeric3 using the Borland Compiler
by Colin J. Williams April 20, 2005

April 20, 2005

I have tried: python setup.py install build_ext --compiler=bcpp It seems that the distutils call uses scipy.distutils, rather than the standard, and that the scipy version is based on an older version of distutils. Is there some way to work around this? Colin W.

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job openings at Enthought
by eric jones April 19, 2005

April 19, 2005

Hey group, We have a number of scientific/python related jobs open. If you have any interest, please see: http://www.enthought.com/careers.htm thanks, eric

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Numeric 24.0
by Travis Oliphant April 19, 2005

April 19, 2005

I am going to release Numeric 24.0 today or tomorrow unless I hear from anybody about some changes that need to get made. -Travis

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bytes object info
by Florian Schulze April 18, 2005

April 18, 2005

Hi! I just discovered this: http://members.dsl-only.net/~daniels/Block.html I didn't try it out, but maybe it's helpful to you. Regards, Florian Schulze

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numarray cholesky solver ?
by Simon Burton April 18, 2005

April 18, 2005

Hi, I see there is a cholesky_decomposition routine in numarray, but we are also needing the corresponding cholesky solver. Is this in the pipeline, or do we go ahead and add the dpotrs based functionality ourselves ? Alternatively, are we able to convert to and from Numeric (scipy) array's without a memcopy ? thankyou, Simon. -- Simon Burton, B.Sc. Licensed PO Box 8066 ANU Canberra 2601 Australia Ph. 61 02 6249 6940 http://arrowtheory.com

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scipy.base - % and fmod segfault
by Arnd Baecker April 18, 2005

April 18, 2005

Hi (in particular Travis), concerning my recent question on % on fmod for Numeric and numarray I was curious to see how scipy.base behaves. With a CVS check-out this morning I get: In [1]: from scipy.base import * In [2]: x=arange(10) In [3]: print x%4 array([0, 1, 2, 3, 0, 1, 2, 3, 0, 1], 'l') In [4]: print (-x)%4 zsh: 12391 segmentation fault ipython (The same holds for fmod, and also for x=arange(10.0) ). Personally I would prefer if in the end % behaves the same way for arrays as for scalars. Do you think that this is possible with scipy.base? Best, Arnd P.S.: I haven't tested much more of scipy.base this time (but the few things concerning array operations I looked at, seem fine. Ah there is one: Doing import scipy.base scipy.base.fmod? in ipython gives a segmentation fault (the same with .sin, .exp etc. ...) )

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Why does nd_image require writable input array ?
by Sebastian Haase April 15, 2005

April 15, 2005

Hi, I'm using memmap to read my MRC-imagedata files. I just thought this might be a case of general interest - see below: >>> s = U.nd.boxcar_filter(Y.vd(1), size=3, output=None, mode="nearest", cval=0.0, origin=0, output_type=None) Traceback (most recent call last): File "<input>", line 1, in ? File "/jws30/haase/PrLin0/numarray/nd_image/filters.py", line 314, in boxcar_filter cval = cval, output_type = output_type) File "/jws30/haase/PrLin0/numarray/nd_image/filters.py", line 261, in boxcar_filter1d cval, origin, _ni_support._type_to_num[output_type]) TypeError: NA_IoArray: I/O numarray must be writable NumArrays. >>> na.__version__ '1.2.3' >>> Thanks, Sebastian Haase

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Pycoin - Python interface to COIN/CLP Linear Programming solver
by Paulo J. S. Silva April 15, 2005

April 15, 2005

Hello, I am finally releasing the code I have to interface COIN/CLP linear programming solver with Python/Numarray. You can download the code at: http://www.ime.usp.br/~pjssilva/pycoin/index.html In the page you can see sample client code. The interface is very simple, consisting mostly of swing interfaces files, but it is very useful to me. It also can be used as an example on how to interface C++ and Python/Numarray using swig. I plan to make this interface grow to something much better, with an interface to full Clp, another to OsiClp (only this one is available right now) and maybe other COIN optimization libraries like IPOPT. Please, download, use, test, comment. Best, Paulo -- Paulo José da Silva e Silva Professor Assistente do Dep. de Ciência da Computação (Assistant Professor of the Computer Science Dept.) Universidade de São Paulo - Brazil e-mail: pjssilva(a)ime.usp.br Web: http://www.ime.usp.br/~pjssilva Teoria é o que não entendemos o (Theory is something we don't) suficiente para chamar de prática. (understand well enough to call) (practice)

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