Mailman 3 December 2003 - NumPy-Discussion

Maybe another "happens the second time" bug
by Edward C. Jones Dec. 9, 2003

Dec. 9, 2003

numarray 0.7, Python 2.3.2, and Gentoo Linux 1.4. #! /usr/bin/env python import numarray from numarray.numerictypes import * arr = numarray.zeros((4,4,4), Int32) arr[0,3,2] = 1 a = numarray.sometrue(arr) b = numarray.sometrue(arr) print a print b

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PyMatrix: Announcement
by Colin J. Williams Dec. 9, 2003

Dec. 9, 2003

PyMatrix is available for test and review. http://www3.sympatico.ca/cjw PyMatrix provides access to basic matrix arithmetic, using Python and numarray. Examples: A * B => the product of matrices A and B A.I => the inverse of matrix A A.EVectors => the eigenvectors of A A.var(0) => the variances of the columns of A (a.T*a).I * a.T*b => the solution (x) for a * x = b, where a is a matrix and b a column vector This package was developed on a Windows XP. I would appreciate comments, particularly with respect to usage on other systems. Colin W.

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by Kirk Pagan Dec. 9, 2003

Dec. 9, 2003

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Adding routines to the numarray package.
by Nadav Horesh Dec. 9, 2003

Dec. 9, 2003

I am using a chirp-z-transform routine which I have ported from an Octave m-file (GPL licensed). What should I do in order to offer it to be included into the numarray.fft package? Nadav.

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way to bettter heallth 0
by Subsumed Dec. 8, 2003

Dec. 8, 2003

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Re: [Numpy-discussion] CVS - built can't find package directory
by Sebastian Haase Dec. 8, 2003

Dec. 8, 2003

> CVS builds fine for me with gcc-3.2.2. I don't have gcc-2.95 anymore. > I built numarray yesterday with Sun cc so I don't think it's a compiler > issue. > > Looking at the code in question, it is fairly new (last 3-4 weeks) so > if it didn't get updated, or got updated with conflicts, it could cause > problems... but not for me. I suggest wiping your current CVS and doing > a complete checkout. I changed in Src/_ufuncmodule.c around line 40 and line 43 (removed the semicolons): #if _PYTHON_CALLBACKS #define ConverterRebuffer(conv,arr,inb) \ PyObject_CallMethod(conv, "rebuffer", "(OO)", arr, inb) #else #define ConverterRebuffer(conv,arr,inb) \ ((PyConverterObject *)conv)->rebuffer(conv, arr, inb) #endif I do not understand why this caused trouble - but in my opinion there don't need to be any semiconlons, because you use it like a function call. Is there some documentation on the nd_image package ? Thanks - Sebastian > > Regards, > Todd > > On Tue, 2003-12-02 at 15:33, Sebastian Haase wrote: > > <snip> > > > cvs update -d -P > > > > Thanks - that was it ... > > > > <snip> > > > > > > Then I get a compiler error: > > > > gcc -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -IInclude/numarray > > > > -I/usr/include/python2.2 -c Src/_ufuncmodule.c -o > > > > build/temp.linux-i686-2.2/_ufuncmodule.o > > > > Src/_ufuncmodule.c: In function `_slow_exec1': > > > > Src/_ufuncmodule.c:1555: parse error before `*' > > > > Src/_ufuncmodule.c:1556: `ro' undeclared (first use in this function) > > > > Src/_ufuncmodule.c:1556: (Each undeclared identifier is reported only > > once > > > > Src/_ufuncmodule.c:1556: for each function it appears in.) > > > > Src/_ufuncmodule.c: In function `_slow_exec2': > > > > Src/_ufuncmodule.c:1876: parse error before `*' > > > > Src/_ufuncmodule.c:1877: parse error before `*' > > > > Src/_ufuncmodule.c:1878: `ri1' undeclared (first use in this function) > > > > Src/_ufuncmodule.c:1878: `ro' undeclared (first use in this function) > > > > Src/_ufuncmodule.c:1908: parse error before `*' > > > > Src/_ufuncmodule.c:1909: parse error before `*' > > > > error: command 'gcc' failed with exit status 1 > > > > > > > > > > I'm not sure what happened here. CVS is currently viable though. Try > > > again. > > > > > > > I just ran it again ... same thing. (my gcc is version 2.95) > > Could you check this ... ? > > > > - Sebastian > > > -- > Todd Miller <jmiller(a)stsci.edu> > >

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by Ellis Pryor Dec. 5, 2003

Dec. 5, 2003

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numarray memmap "reopen" problem
by Sebastian Haase Dec. 5, 2003

Dec. 5, 2003

Hi, I create a memmap file with mode 'w+'. But I forgot to assign a name to the object. So just call the same function again. But this time I get a "no such file error" ! a) the file actually does exist , b) It shouldn't care, because mode == 'w+'. This is the traceback I get : (len == 1024) >>> Mrc.bindMrc("C:/mm7.mrc", mode='w+') array([], type=Int8) >>> a = Mrc.bindMrc("C:/mm7.mrc", mode='w+') Traceback (most recent call last): File "<input>", line 1, in ? File "X:\PrWin\Priithon\Mrc.py", line 9, in bindMrc a = Mrc(fn,mode) File "X:\PrWin\Priithon\Mrc.py", line 43, in __init__ self.m = mm.open(filename=path, mode=mode, len=len) File "X:\PrWin\numarray\memmap.py", line 762, in open return Memmap(filename, mode, len) File "X:\PrWin\numarray\memmap.py", line 269, in __init__ file = _open(filename, (mode == "c" and "r" or mode)) File "X:\PrWin\numarray\memmap.py", line 236, in _open return __open(file, mode+"b") IOError: [Errno 2] No such file or directory: 'C:/mm7.mrc' Any idea how this error message could come about ? Regards, Sebastian Haase

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Re: [Numpy-discussion] numarray.records - get/set item
by Colin J. Williams Dec. 4, 2003

Dec. 4, 2003

Thanks, I've copied the list here. Colin W. Sebastian Haase wrote: >Hi Colin, >Did you also forget to cc that message to the mailing list - because I just >realized that I send my second mail directly to Perry (only) >[I'm not part of the "numarray-team" - so you would need to resent this >message to the list ...] > >Regards, >Sebastian > >----- Original Message ----- >From: "Colin J. Williams" <cjw(a)sympatico.ca> >To: "Sebastian Haase" <haase(a)msg.ucsf.edu> >Sent: Thursday, December 04, 2003 4:01 PM >Subject: Re: [Numpy-discussion] numarray.records - get/set item > > > > >>Sebastian Haase wrote: >> >> >> >>>Hi, >>>Is it maybe a good idea to add this to the definition of 'class Record' >>> >>>class Record: >>> """Class for one single row.""" >>><snip> >>> def __getitem__(self, fieldName): >>> return self.array.field(fieldName)[self.row] >>> def __setitem__(self, fieldName, value): >>> self.array.field(fieldName)[self.row] = value >>> >>>I don't know about the implications if __delitem __ and so on are not >>>defined. >>>I just think it would look quite nice to say >>>myRecArr[0]['mmm'] = 'hallo' >>>as opposed to >>>myRecArr[0].setfield('mmm', 'hallo') >>> >>>Actually I would even like >>>myRecArr[0].mmm = 'hallo' >>> >>>This should be possible by defining __setattr__. >>>It would obviously only work for fieldnames that do not contain '.' or ' >>> >>> >' > > >>>or ... >>> >>>Any comments ? >>> >>> >>> >>> >>I prefer this, it requires fewer key strokes and should be easy to do. >> >>Colin W. >> >> >> >> >> > > > >

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numarray.records - get/set item
by Sebastian Haase Dec. 4, 2003

Dec. 4, 2003

Hi, Is it maybe a good idea to add this to the definition of 'class Record' class Record: """Class for one single row.""" <snip> def __getitem__(self, fieldName): return self.array.field(fieldName)[self.row] def __setitem__(self, fieldName, value): self.array.field(fieldName)[self.row] = value I don't know about the implications if __delitem __ and so on are not defined. I just think it would look quite nice to say myRecArr[0]['mmm'] = 'hallo' as opposed to myRecArr[0].setfield('mmm', 'hallo') Actually I would even like myRecArr[0].mmm = 'hallo' This should be possible by defining __setattr__. It would obviously only work for fieldnames that do not contain '.' or ' ' or ... Any comments ? Sebastian Haase

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