[Numpy-discussion] recarray.__setattr__ bug?

Is the following the desired behaviour for setting recarray attributes?  This seems to clash with the semantics for arrays.  >>> from numpy import *  >>> a = array([1,2,3])  >>> b = a.view([('x',int),('y',int),('z',int)])  >>> r = b.view(recarray)  >>> b['x'] = 0  >>> r.y = 0  >>> a  array([0, 2,

[Numpy-discussion] NumPy on Intel C/MKL

Hello all I managed to get NumPy to compile with the free for non-commercial use Linux versions of the Intel C compiler, version 9.1 and Intel MKL 8.1. Instructions at the bottom of this page: http://www.scipy.org/Installing_SciPy/Linux I ran the NumPy test suite, and it turned up a few test fai

Re: [Numpy-discussion] adding an attribute to an nd-array

Hello all > -Original Message- > From: [EMAIL PROTECTED] [mailto:numpy- > [EMAIL PROTECTED] On Behalf Of Travis Oliphant > Sent: Thursday, October 19, 2006 5:45 PM > To: Discussion of Numerical Python > Subject: Re: [Numpy-discussion] adding an attribute to an nd-array > > Stefan van der

Re: [Numpy-discussion] Sorting eigenvalues and vectors together

Sven Schreiber wrote: > IIRC, if the eigenvalues returned by numpy are real numbers (due to the > type of the underlying matrix and algorithm), then they are > automatically returned ascending (again, IIRC). This should be considered an implementation detail that may change in the future, so don

Re: [Numpy-discussion] Defining custom types

On 10/27/06, Travis Oliphant <[EMAIL PROTECTED]> wrote: Jonathan Wang wrote:> On 10/27/06, *Travis Oliphant* <[EMAIL PROTECTED]> [EMAIL PROTECTED] >> wrote:>> > If I redefine the string function, I encounter another, perhaps more> > serious problem leading to a segfault. I've defined my str

Re: [Numpy-discussion] Sorting eigenvalues and vectors together

jeremito schrieb: > argsort() will do the trick. Thanks once again. > Jeremy > I was a bit confused by your question, maybe you can clarify what you did in the end. IIRC, if the eigenvalues returned by numpy are real numbers (due to the type of the underlying matrix and algorithm), then they

Re: [Numpy-discussion] Sorting eigenvalues and vectors together

argsort() will do the trick. Thanks once again. Jeremy - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM

Re: [Numpy-discussion] Defining custom types

Jonathan Wang wrote: > On 10/27/06, *Travis Oliphant* <[EMAIL PROTECTED] > > wrote: > > > If I redefine the string function, I encounter another, perhaps more > > serious problem leading to a segfault. I've defined my string > function > > to be extremely

Re: [Numpy-discussion] Defining custom types

On 10/27/06, Travis Oliphant <[EMAIL PROTECTED]> wrote: > If I redefine the string function, I encounter another, perhaps more> serious problem leading to a segfault. I've defined my string function> to be extremely simple:> >>> def printer(arr): > ...   return str(arr[0])>> Now, if I try to print

Re: [Numpy-discussion] pyaudio, a module to make noise from numpy arrays

> David Cournapeau wrote: >> Hi, >>I announce the first release of pyaudio, a module to make noise from >> numpy arrays (read, write and play audio files with numpy arrays). Does this have anything to do with this pyaudio? http://people.csail.mit.edu/hubert/pyaudio/ -Chris -- Christophe

Re: [Numpy-discussion] pyaudio, a module to make noise from numpy arrays

On Fri, 27 Oct 2006, Travis Oliphant wrote: > David Cournapeau wrote: > > Hi, > >I announce the first release of pyaudio, a module to make noise from > > numpy arrays (read, write and play audio files with numpy arrays). > > > > Very nice. Thank you. I'd like to see exactly this kind

Re: [Numpy-discussion] pyaudio, a module to make noise from numpy arrays

David Cournapeau wrote: > Hi, >I announce the first release of pyaudio, a module to make noise from > numpy arrays (read, write and play audio files with numpy arrays). > Very nice. Thank you. I'd like to see exactly this kind of thing for video files too. We can get a lot of mileage

Re: [Numpy-discussion] pyaudio, a module to make noise from numpy arrays

On 10/27/06, David L. Goldsmith <[EMAIL PROTECTED]> wrote: > I'm sure some others _might_ regard this as frivolous, so let me just > say: "Way Cool"! Thanks! +1, and not frivolous at all. It's /really/ neat to be able to pull in data from standard image formats (say jpeg) into arrays to quickly

Re: [Numpy-discussion] Sorting eigenvalues and vectors together

jeremito wrote: > I am using a = numpy.linalg.eig(A) to get the eigenvalues and > eigenvectors. I am interested only in the largest eigenvalue so I > would like to sort the first element of a. But if I do that, I won't > know what is the associated eigenvector. Is there a function that will > so

Re: [Numpy-discussion] dtype() examples that used to work

Joris De Ridder wrote: > Hi, > > The following did once work in NumPy: > > dtype([int16]) dtype([[int16]]) dtype([uint,int32]) dtype(['f8','S10']) > > but now they all generate a "TypeError: data type not understood". Why? > I could not find the answer in help(d

Re: [Numpy-discussion] numpy-1.0 regress failure on OpenBSD

On Thu, 26 Oct 2006, Travis Oliphant wrote: > Unless you want to help with tracking how long double is interpreted on > several platforms, then just ignore the test. (It actually wasn't being > run in 1.0b1). I'm happy to help - do you have a testcase that I can run on the various platforms th

Re: [Numpy-discussion] pyaudio, a module to make noise from numpy arrays

I'm sure some others _might_ regard this as frivolous, so let me just say: "Way Cool"! Thanks! DG David Cournapeau wrote: > Hi, >I announce the first release of pyaudio, a module to make noise from > numpy arrays (read, write and play audio files with numpy arrays). > > * WHAT FOR ?: > >

Re: [Numpy-discussion] Sorting eigenvalues and vectors together

On 10/27/06, jeremito <[EMAIL PROTECTED]> wrote: > I am using a = numpy.linalg.eig(A) to get the eigenvalues and > eigenvectors. I am interested only in the largest eigenvalue so I > would like to sort the first element of a. But if I do that, I won't > know what is the associated eigenvector. I

Re: [Numpy-discussion] Sorting eigenvalues and vectors together

On 27/10/06, jeremito <[EMAIL PROTECTED]> wrote: > I am using a = numpy.linalg.eig(A) to get the eigenvalues and > eigenvectors. I am interested only in the largest eigenvalue so I > would like to sort the first element of a. But if I do that, I won't > know what is the associated eigenvector. I

[Numpy-discussion] Sorting eigenvalues and vectors together

I am using a = numpy.linalg.eig(A) to get the eigenvalues and eigenvectors. I am interested only in the largest eigenvalue so I would like to sort the first element of a. But if I do that, I won't know what is the associated eigenvector. Is there a function that will sort the values and vectors

Re: [Numpy-discussion] dtype() examples that used to work

A Divendres 27 Octubre 2006 18:13, Joris De Ridder va escriure: > Hi, > > The following did once work in NumPy: > >>> dtype([int16]) > >>> dtype([[int16]]) > >>> dtype([uint,int32]) > >>> dtype(['f8','S10']) > > but now they all generate a "TypeError: data type not understood". Why? Should be inte

Re: [Numpy-discussion] astype() behaviour

A Divendres 27 Octubre 2006 17:58, Joris De Ridder va escriure: > Hi, > > Is the following behaviour of astype() intentional in NumPy 1.0? > > >>> x = array([1,2,3]) > >>> x.astype(None) > > array([ 1., 2., 3.]) > > That is, the int32 is converted to float64. Yes, I think the behaviour is intend

Re: [Numpy-discussion] Python Enhancement Proposal (PEP) - Current status?

Christopher Barker wrote: > Travis Oliphant wrote: > >> I'm working on two PEP's after discussing this with Guido at SciPy 2006. >> >> 1) A data-type object PEP >> 2) An extension of the buffer protocol to include the array interface. >> >> These are being done instead of the basearray PEP for

Re: [Numpy-discussion] Python Enhancement Proposal (PEP) - Current status?

Travis Oliphant wrote: > I'm working on two PEP's after discussing this with Guido at SciPy 2006. > > 1) A data-type object PEP > 2) An extension of the buffer protocol to include the array interface. > > These are being done instead of the basearray PEP for now. Those are a great starts, and

[Numpy-discussion] dtype() examples that used to work

Hi, The following did once work in NumPy: >>> dtype([int16]) >>> dtype([[int16]]) >>> dtype([uint,int32]) >>> dtype(['f8','S10']) but now they all generate a "TypeError: data type not understood". Why? I could not find the answer in help(dtype), the RecordArrays tutorial on scipy.org, the NumPy

[Numpy-discussion] astype() behaviour

Hi, Is the following behaviour of astype() intentional in NumPy 1.0? >>> x = array([1,2,3]) >>> x.astype(None) array([ 1., 2., 3.]) That is, the int32 is converted to float64. J. Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm -

Re: [Numpy-discussion] Python Enhancement Proposal (PEP) - Current status?

Travis Oliphant wrote: > Colin J. Williams wrote: > >> A July posting sets out the intent: >> http://scipy.org/BaseArray >> Version 3 of the draft: >> http://numpy.scipy.org/array_interface.shtml >> There is a description, from a C Structure perspective: >> http://svn.scipy.org/svn/PEP/PEP_bas

Re: [Numpy-discussion] Defining custom types

Jonathan Wang wrote: > On 10/26/06, *Travis Oliphant* <[EMAIL PROTECTED] > > wrote: > > > Okay, is my understanding here correct? I am defining two type > > descriptors: > > PyArray_Descr mxNumpyType - describes the Numpy array type. > > PyTypeObject mxNum

Re: [Numpy-discussion] Python Enhancement Proposal (PEP) - Current status?

Colin J. Williams wrote: > A July posting sets out the intent: > http://scipy.org/BaseArray > Version 3 of the draft: > http://numpy.scipy.org/array_interface.shtml > There is a description, from a C Structure perspective: > http://svn.scipy.org/svn/PEP/PEP_basearray.txt > > What is the current sta

[Numpy-discussion] Python Enhancement Proposal (PEP) - Current status?

A July posting sets out the intent: http://scipy.org/BaseArray Version 3 of the draft: http://numpy.scipy.org/array_interface.shtml There is a description, from a C Structure perspective: http://svn.scipy.org/svn/PEP/PEP_basearray.txt What is the current status of the plan to develop a PEP? Is th

Re: [Numpy-discussion] Defining custom types

On 10/26/06, Travis Oliphant <[EMAIL PROTECTED]> wrote: > Okay, is my understanding here correct? I am defining two type > descriptors:> PyArray_Descr mxNumpyType - describes the Numpy array type.> PyTypeObject mxNumpyDataType - describes the data type of the contents> of the array (i.e. mxNumpyTyp

Re: [Numpy-discussion] Matrices for testing

> Well if all you want is some matrices, there's nothing stopping you > from grabbing the matrices in the LAPACK distribution and using them > yourself. Robert's just saying they won't be included in Numpy. > There's also the matrix market, whcih has a large number of > (sparse-only?) example mat

Re: [Numpy-discussion] Changes to bools under Numexpr

Ivan Vilata i Balaguer wrote: > En/na Colin J. Williams ha escrit: > > >> Ivan Vilata i Balaguer wrote: >> >>> Hi all. The attached diff makes some changes to Numexpr support for >>> booleans. The changes and their rationale are below. >>> >>> 1. New ``True`` and ``False`` boolean const

Re: [Numpy-discussion] memory position of numpy arrays

Hello Gael (sorry, I just don't get the dots...), Am Freitag, den 27.10.2006, 08:46 +0200 schrieb Gael Varoquaux: > Worked great for me ! My approach was to write a small wrapper C > (actually C++, with "extern C" linking) library that exposed only what I > needed of the camera interface, in a "py

[Numpy-discussion] pyaudio, a module to make noise from numpy arrays

Hi, I announce the first release of pyaudio, a module to make noise from numpy arrays (read, write and play audio files with numpy arrays). * WHAT FOR ?: The Goal is to give to a numpy/scipy environmenet some basic audio IO facilities (ala sound, wavread, wavwrite of matlab). With pya

Re: [Numpy-discussion] [ANN] NumPy 1.0 release

En/na Travis E. Oliphant ha escrit:: > We are very pleased to announce the release of NumPy 1.0 available for > download at http://www.numpy.org > > This release is the culmination of over 18 months of effort to allow > unification of the Numeric and Numarray communities. [...] Wow, let me sa

Re: [Numpy-discussion] build errors Solaris x86 64 bit python2.5

On 10/26/06, Charles R Harris <[EMAIL PROTECTED]> wrote: On 10/26/06, Mathew Yeates < [EMAIL PROTECTED]> wrote: yes, I got around the problem from my previous posting "distutilsquestion". I added ld_args[:0] = ['-m64'] to line 209 ofpython2.5/distutils/unixcompiler.py. Lovely, yes I know.I now get

Re: [Numpy-discussion] Changes to bools under Numexpr

En/na Colin J. Williams ha escrit: > Ivan Vilata i Balaguer wrote: >> Hi all. The attached diff makes some changes to Numexpr support for >> booleans. The changes and their rationale are below. >> >> 1. New ``True`` and ``False`` boolean constants. This is so that 1 and >>0 are always prope