Mailman 3 August 2006 - NumPy-Discussion

stumped numpy user seeks help
by Mathew Yeates 31 Aug '06

31 Aug '06

My head is about to explode. I have an M by N array of floats. Associated with the columns are character labels ['a','b','b','c','d','e','e','e'] note: already sorted so duplicates are contiguous I want to replace the 2 'b' columns with the sum of the 2 columns. Similarly, replace the 3 'e' columns with the sum of the 3 'e' columns. The resulting array still has M rows but less than N columns. Anyone? Could be any harder than Sudoku. Mathew

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(no subject)
by Thilo Wehrmann 31 Aug '06

31 Aug '06

Hi, currently I´m trying to compile the latest numpy version (1.0b4) under an SGI IRIX 6.5 environment. I´m using the gcc 3.4.6 compiler and python 2.4.3 (self compiled). During the compilation of numpy.core I get a nasty error message: ... copying build/src.irix64-6.5-2.4/numpy/__config__.py -> build/lib.irix64-6.5-2.4/numpy copying build/src.irix64-6.5-2.4/numpy/distutils/__config__.py -> build/lib.irix64-6.5-2.4/numpy/distutils running build_ext customize UnixCCompiler customize UnixCCompiler using build_ext customize MipsFCompiler customize MipsFCompiler customize MipsFCompiler using build_ext building 'numpy.core.umath' extension compiling C sources C compiler: gcc -fno-strict-aliasing -DNDEBUG -D_FILE_OFFSET_BITS=64 -DHAVE_LARGEFILE_SUPPORT -fmessage-length=0 -Wall -O2 compile options: '-Ibuild/src.irix64-6.5-2.4/numpy/core/src -Inumpy/core/include -Ibuild/src.irix64-6.5-2.4/numpy/core -Inumpy/core/src -Inumpy/core/include -I/usr/local/include/python2.4 -c' gcc: build/src.irix64-6.5-2.4/numpy/core/src/umathmodule.c numpy/core/src/umathmodule.c.src: In function `nc_sqrtf': numpy/core/src/umathmodule.c.src:602: warning: implicit declaration of function `hypotf' numpy/core/src/umathmodule.c.src: In function `nc_sqrtl': numpy/core/src/umathmodule.c.src:602: warning: implicit declaration of function `fabsl' ... ... lots of math functions ... ... numpy/core/src/umathmodule.c.src: In function `LONGDOUBLE_frexp': numpy/core/src/umathmodule.c.src:1940: warning: implicit declaration of function `frexpl' numpy/core/src/umathmodule.c.src: In function `LONGDOUBLE_ldexp': numpy/core/src/umathmodule.c.src:1957: warning: implicit declaration of function `ldexpl' In file included from numpy/core/src/umathmodule.c.src:2011: build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c: At top level: build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:15: error: `acosl' undeclared here (not in a function) build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:15: error: initializer element is not constant build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:15: error: (near initialization for `arccos_data[2]') ... ... lots of math functions ... ... build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:192: error: initializer element is not constant build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:192: error: (near initialization for `tanh_data[2]') numpy/core/include/numpy/ufuncobject.h:328: warning: 'generate_overflow_error' defined but not used numpy/core/src/umathmodule.c.src: In function `nc_sqrtf': numpy/core/src/umathmodule.c.src:602: warning: implicit declaration of function `hypotf' ... ... lots of math functions ... ... numpy/core/src/umathmodule.c.src: In function `FLOAT_frexp': numpy/core/src/umathmodule.c.src:1940: warning: implicit declaration of function `frexpf' numpy/core/src/umathmodule.c.src: In function `FLOAT_ldexp': numpy/core/src/umathmodule.c.src:1957: warning: implicit declaration of function `ldexpf' numpy/core/src/umathmodule.c.src: In function `LONGDOUBLE_frexp': numpy/core/src/umathmodule.c.src:1940: warning: implicit declaration of function `frexpl' numpy/core/src/umathmodule.c.src: In function `LONGDOUBLE_ldexp': numpy/core/src/umathmodule.c.src:1957: warning: implicit declaration of function `ldexpl' In file included from numpy/core/src/umathmodule.c.src:2011: build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c: At top level: build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:15: error: `acosl' undeclared here (not in a function) build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:15: error: initializer element is not constant ... ... lots of math functions ... ... build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:192: error: initializer element is not constant build/src.irix64-6.5-2.4/numpy/core/__umath_generated.c:192: error: (near initialization for `tanh_data[2]') numpy/core/include/numpy/ufuncobject.h:328: warning: 'generate_overflow_error' defined but not used error: Command "gcc -fno-strict-aliasing -DNDEBUG -D_FILE_OFFSET_BITS=64 -DHAVE_LARGEFILE_SUPPORT -fmessage-length=0 -Wall -O2 -Ibuild/src.irix64-6.5-2.4/numpy/core/src -Inumpy/core/include -Ibuild/src.irix64-6.5-2.4/numpy/core -Inumpy/core/src -Inumpy/core/include -I/usr/local/include/python2.4 -c build/src.irix64-6.5-2.4/numpy/core/src/umathmodule.c -o build/temp.irix64-6.5-2.4/build/src.irix64-6.5-2.4/numpy/core/src/umathmodule.o" failed with exit status 1 Can somebody explain me, what´s going wrong. It seems there is some header files missing. thanks, thilo -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer

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Interfacing with PIL?
by Ghalib Suleiman 31 Aug '06

31 Aug '06

I'm somewhat new to both libraries...is there any way to create a 2D array of pixel values from an image object from the Python Image Library? I'd like to do some arithmetic on the values.

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[Numpy-discussion] re:运用EXCEL和PPT改进管理和经营决策
by "9月9-10日/上海" 30 Aug '06

30 Aug '06

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Re: [Numpy-discussion] eoRXwu
by Ellil Rendon 30 Aug '06

30 Aug '06

Hi, http://ikanuyunfadesun.com , s , c , f move. The soldier at the door looked at me, looked away. Steengo had military service were mutually incompatible for the most part. I Since I know next to nothing about music he is going to teach me my

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Use of numarray from numpy package
by LANDRIU David SAp 30 Aug '06

30 Aug '06

Hello, is it necessary to install numarray separately to use numpy ? Indeed, after numpy installation, when I try to use it in the code, I get the same error as below : .../... Python 2.4.1 (#1, May 13 2005, 13:45:18) [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-42)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> from numarray import * Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.3/site-packages/numpy/numarray/__init__.py", line 1, in ? from util import * File "/usr/local/lib/python2.3/site-packages/numpy/numarray/util.py", line 2, in ? from numpy import geterr ImportError: No module named numpy >>> Thanks for your answer, Cheers, David Landriu -------------------------------------------------------------------- David Landriu DAPNIA/SAp CEA SACLAY (France) Phone : (33|0)169088785 Fax : (33|0)169086577 ---------------------------------------------------------------------

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array indexing problem
by Rahul Kanwar 30 Aug '06

30 Aug '06

Hello, I am trying to extract a column from a 2D array here is what is have done: -------------------------------------------- In [3]: a = array([[1,2,3],[1,2,3]]) In [4]: a Out[4]: array([[1, 2, 3], [1, 2, 3]]) In [5]: a[:, 1] Out[5]: array([2, 2]) In [6]: a[:, 1:2] Out[6]: array([[2], [2]]) -------------------------------------------- when i use a[:, 1] i get a 1x2 array where as when i use a[:, 1:2] i get a 2x1 array. The intuitive behavior of a[:, 1] should be a 2x1 array. Am i doing something wrong here or is there some reason for this behavior ? regards, Rahul

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Re: [Numpy-discussion] [ANN] NumPy 1.0b4 now available
by bruce.who.hk 30 Aug '06

30 Aug '06

Hi, Travis I tried numpy1.0b4 and add this to setup.py includes = ["numpy.core._internal"] then it works! And all scripts can be packed into a single executables with "bundle_files":2, "skip_archive":0, zipfile = None, --skip_archive option is not needed now. ------------------------------------------------------------- >I suspect you need to force-include the numpy/core/_internal.py file by >specifying it in your setup.py file as explained on the py2exe site. >That module is only imported by the multiarraymodule.c file which I >suspect py2exe can't automatically discern. > >In 1.0 we removed the package-loader issues which are probably giving >the scipy-style subpackage errors. So, very likely you might be O.K. >with the beta releases of 1.0 as long as you tell py2exe about >numpy/core/_internal.py so that it gets included in the distribution. > >Please post any successes. > >Best, > >-Travis > >-- >http://mail.python.org/mailman/listinfo/python-list ------------------ bruce.who.hk 2006-08-30

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profusion supremely
by Stanislaus Farrell 30 Aug '06

30 Aug '06

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array indexing problem
by Rahul Kanwar 30 Aug '06

30 Aug '06

Hello, I am trying to extract a column from a 2D array here is what is have done: -------------------------------------------- In [3]: a = array([[1,2,3],[1,2,3]]) In [4]: a Out[4]: array([[1, 2, 3], [1, 2, 3]]) In [5]: a[:, 1] Out[5]: array([2, 2]) In [6]: a[:, 1:2] Out[6]: array([[2], [2]]) -------------------------------------------- when i use a[:, 1] i get a 1x2 array where as when i use a[:, 1:2] i get a 2x1 array. The intuitive behavior of a[:, 1] should be a 2x1 array. Am i doing something wrong here or is there some reason for this behavior ? regards, Rahul

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