Mailman 3 August 2006 - NumPy-Discussion

re:车间管理人员八项修炼
by "8月12-13日/上海" Aug. 7, 2006

Aug. 7, 2006

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numpy compilation question
by Hanno Klemm Aug. 7, 2006

Aug. 7, 2006

Hello, I try to compile numpy-1.0b1 with blas and lapack support. I have compiled blas and lapack according to the instrunctions in http://pong.tamu.edu/tiki/tiki-view_blog_post.php?blogId=6&postId=97 . I copied the libraries to /scratch/python2.4/lib and set the environment variables accordingly. python setup.py config in the numpy directory then finds the libraries. If I then do python setup.py build The compilation dies with the error message: .. build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x28ae): In function `dotblas_vdot': numpy/core/blasdot/_dotblas.c:971: undefined reference to `PyArg_ParseTuple' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2b45):numpy/core/blasdot/_dotblas.c:1002: undefined reference to `PyTuple_N ew' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2b59):numpy/core/blasdot/_dotblas.c:83: undefined reference to `PyArg_Parse Tuple' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2b6d):numpy/core/blasdot/_dotblas.c:107: undefined reference to `_Py_NoneSt ruct' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2cba):numpy/core/blasdot/_dotblas.c:1021: undefined reference to `PyExc_Val ueError' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2cc9):numpy/core/blasdot/_dotblas.c:1021: undefined reference to `PyErr_Set String' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2d1c):numpy/core/blasdot/_dotblas.c:1029: undefined reference to `PyEval_Sa veThread' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2d3f):numpy/core/blasdot/_dotblas.c:1049: undefined reference to `PyEval_Re storeThread' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2d63):numpy/core/blasdot/_dotblas.c:1045: undefined reference to `cblas_cdo tc_sub' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2d84):numpy/core/blasdot/_dotblas.c:1041: undefined reference to `cblas_zdo tc_sub' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2da1):numpy/core/blasdot/_dotblas.c:1037: undefined reference to `cblas_sdo t' build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o(.text+0x2dc6):numpy/core/blasdot/_dotblas.c:1033: undefined reference to `cblas_ddo t' /usr/lib/gcc-lib/x86_64-redhat-linux/3.2.3/libfrtbegin.a(frtbegin.o)(.text+0x22): In function `main': : undefined reference to `MAIN__' collect2: ld returned 1 exit status error: Command "/usr/bin/g77 -L/scratch/apps/lib build/temp.linux-x86_64-2.4/numpy/core/blasdot/_dotblas.o -L/scratch/python2.4/lib -lfblas - lg2c -o build/lib.linux-x86_64-2.4/numpy/core/_dotblas.so" failed with exit status 1 I try this on a dual processor Xeon machine with gcc 3.2.3 under an old redhat distribution. Therefore using the libraries delivered with the distro don't work as they are broken. At first I tried to compile numpy with atlas support but I got similar problems. I have attached the full output of the failed build. I would be very grateful if somebody with a little more experience with compilers could have a look at it and maybe point me in the right direction. Many thanks in advance, Hanno -- Hanno Klemm klemm(a)phys.ethz.ch

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comments on r_ and c_ ?
by Bill Baxter Aug. 7, 2006

Aug. 7, 2006

When you have a chance, could the powers that be make some comment on the r_ and c_ situation? From what I understand Travis added these fairly recently and they aren't officially documented anywhere. There was discussion previously about whether to rename them or not, but no real conclusion was reached on better names (I've kind of grown to like the x_ style naming in the mean time). I do think the subtle differences in behavior between these and existing methods (hstack,vstack,column_stack) are an issue, though, which I outlined in a previous email. Thanks, --Bill

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fixing diag() for matrices
by Sven Schreiber Aug. 6, 2006

Aug. 6, 2006

Hi, there was a thread about this before, diag() is currently only partly useful if you work with numpy-matrices, because the 1d->2d direction doesn't work, as there are no 1d-numpy-matrices. This is unfortunate because a numpy-matrix with shape (n,1) or (1,m) should be naturally treated as a vector, imho. So it would be nice if this could be fixed. It's probably not the most efficient solution, but what I want for numpy-matrix input x is to get: mat(diag(x.A.squeeze)) where diag is the current implementation. This means that if x is not a vector ("truly 2d"), then nothing is changed. But if one of the dimensions of x is ==1, then it's turned into a 1d-array, and diag works as it should. Does that sound reasonable? Thanks, Sven

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divmod issue
by David Grant Aug. 6, 2006

Aug. 6, 2006

The following lines of code: from numpy import floor div, mod = divmod(floor(1.5), 12) generate an exception: ValueError: need more than 0 values to unpack in numpy-0.9.8. Does anyone else see this? It might be due to the fact that floor returns a float64scalar. Should I be forced to cast that to an int before calling divmod with it? -- David Grant http://www.davidgrant.ca

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NumPy documentation
by Albert Strasheim Aug. 6, 2006

Aug. 6, 2006

Hello all With NumPy 1.0 mere weeks away, I'm hoping we can improve the documentation a bit before the final release. Some things we might want to think about: 1. Documentation Sprint This page: http://www.scipy.org/SciPy2006/CodingSprints mentions a possible Documentation Sprint at SciPy 2006. Does anybody know if this is going to happen? 2. Tickets for missing functions missing docstrings Would it be helpful to create tickets for functions that currently don't have docstrings? If not, is there a better way we can keep track of the state of the documentation? 3. Examples in documentation Do we want to include examples in the docstrings? Some functions already do, and I think think this can be quite useful when one is exploring the library. Maybe the example list: http://www.scipy.org/Numpy_Example_List should be incorporated into the docstrings? Then we can also set up doctests to make sure that all the examples really work. 4. Documentation format If someone wants to submit documentation to be included, say as patches attached to tickets, what kind of format do we want? There's already various PEPs dealing with this topic: Docstring Processing System Framework http://www.python.org/dev/peps/pep-0256/ Docstring Conventions http://www.python.org/dev/peps/pep-0257/ Docutils Design Specification http://www.python.org/dev/peps/pep-0258/ reStructuredText Docstring Format http://www.python.org/dev/peps/pep-0287/ 5. Documentation tools A quick search turned up docutils: http://docutils.sourceforge.net/ and epydoc: http://epydoc.sourceforge.net/ Both of these support restructured text, so that looks like the way to go. I think epydoc can handle LaTeX equations and some LaTeX support has also been added to docutils recently. This might be useful for describing some functions. Something else to consider is pydoc compatibility. NumPy currently breaks pydoc: http://projects.scipy.org/scipy/numpy/ticket/232 It also breaks epydoc 3.0a2 (maybe an epydoc bug): http://sourceforge.net/tracker/index.php?func=detail&aid=1535178&group_id=32 455&atid=405618 Anything else? How should we proceed to improve NumPy's documentation? Regards, Albert

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Talladega
by shapes Aug. 6, 2006

Aug. 6, 2006

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re;车间管理人员八项修炼
by "8月12-13日/上海" Aug. 5, 2006

Aug. 5, 2006

1 0

SciPy SVN and NumPy SVN should work together now
by Travis Oliphant Aug. 5, 2006

Aug. 5, 2006

I've finished the updates to backward compatibility to Numeric. SciPy passes all tests. Please report any outstanding issues you may encounter. It would be nice to remove dependency on oldnumeric from SciPy entirely. -Travis

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ImportError: cannot import name oldnumeric
by Larry Welenc Aug. 5, 2006

Aug. 5, 2006

I receive an error message when trying to import scipy: import scipy File "C:\Python24\Lib\site-packages\scipy\__init__.py", line 32, in -toplevel- from numpy import oldnumeric ImportError: cannot import name oldnumeric Numpy is installed. How to I correct this problem? Larry W

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