fortran array indices are reversed, but this is the
most natural way in any case.
--George Nurser
On 10 April 2016 at 11:53, Sebastian Berg
wrote:
> On So, 2016-04-10 at 12:04 +0200, Vasco Gervasi wrote:
> > Hi all,
> > I am trying to write some code to do calculation onto an arra
t doesn't seem to
be appearing on it as far as I can see.)
Best regards, George Nurser
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Note also that OpenBlas claims performance as good as MKL with Sandy Bridge
processors.
https://github.com/xianyi/OpenBLAS/wiki/faq#wiki-sandybridge_perf
George Nurser.
On 10 November 2012 00:38, Dag Sverre Seljebotn
wrote:
> On 11/09/2012 11:57 PM, Matthieu Brucher wrote:
> > Hi,
&g
Hi,
It's really good to see this work being done.
It would be great if this could somehow be put also into the np.einsum
function, which currently doesn't even use blas, and is consequently
substantially slower than current np.dot (timings on
http://mail.scipy.org/pipermail/numpy-discussion/2012-O
On 25 October 2012 22:54, David Warde-Farley wrote:
> On Wed, Oct 24, 2012 at 7:18 AM, George Nurser wrote:
> > Hi,
> >
> > I was just looking at the einsum function.
> > To me, it's a really elegant and clear way of doing array operations,
> which
> > i
ation seems ~ 4-6x slower than dot or
tensordot for decent size arrays.
I suspect it is because the implementation does not use blas/lapack calls.
cheers, George Nurser.
E.g. (in ipython on Mac OS X 10.6, python 2.7.3, numpy 1.6.2 from macports)
a = np.arange(60.).reshape(1500,400)
b = np.a
argument arrays
clumsy, I know.
George Nurser
On 3 July 2012 02:17, Casey W. Stark wrote:
> Hi numpy.
>
> Does anyone know if f2py supports allocatable arrays, allocated inside
> fortran subroutines? The old f2py docs seem to indicate that the allocatable
> array must be created
Works fine with the [...]s.
Thanks very much.
--George
On 10 August 2011 17:15, Mark Wiebe wrote:
> On Wed, Aug 10, 2011 at 3:45 AM, George Nurser wrote:
>>
>> Hi,
>> I'm running numpy 1.6.1rc2 + python 2.7.1 64-bit from python.org on OSX
>> 10.6.8.
>>
&
o.
I'm not sure whether I've just called it incorrectly, or whether
perhaps it's only supposed to work with one output array.
--George Nurser.
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SUSE 11.3, python 2.7, gcc 4.3.4, gfortran from gcc 4.6.0, I get two failures on
commit 1439a8ddcb2eda20fa102aa44e846783f29c0af3 (head of 1.6.x
maintenance branch).
--George.
==
FAIL: Test basic arithmetic function errors
--
undefined, since a.shape[0] != f.shape[0]
E(f,'ij',f,'ji') = f_{ij}*f_{ji} = f*f.T
Broadcasting would be explicit
E(f,'ij',d,'j') =a_{ij}*d_j = a*d
E(f,'ij',d,'i') =a_{ij}*d_i = a*d[:,None]
If a definite order of precedence of sums were est
-- Forwarded message --
From: George Nurser
Date: 30 July 2010 22:37
Subject: Re: [Matplotlib-users] Vectorization
To: Nicolas Bigaouette , Discussion of
Numerical Python
> I want to do the same for the calculation of the kinetic energy:
> /2m. There is a laplacian
wrote:
> If header files are provided, the work done by f2py is almost done.
> But you don't know the real Fortran interface, so you still have to
> use ctypes over f2py.
>
> Matthieu
>
> 2010/2/18 George Nurser :
>> Hi Nils,
>> I've not tried it, but you
Hi Nils,
I've not tried it, but you might be able to interface with f2py your
own fortran subroutine that calls the library.
Then issue the f2py command with extra arguments -l
-L.
See section 5 of
http://cens.ioc.ee/projects/f2py2e/usersguide/index.html#command-f2py
--George.
On 18 February 20
2009/11/4 Robin :
> On Wed, Nov 4, 2009 at 2:38 PM, George Nurser wrote:
>> Fortran can accept preprocessor directives, but f2py cannot.
>> You first need to preprocess a .F (or .F90) file to create a .f (or
>> .f90) file which you then pass to f2py
>> The way I prepro
gfortran -E -DINTSIZE=8 file.F -o outdir/file.f
The outdir is necessary in a case-insensitive file system (like
default mac OSX) to prevent the .f files overwriting the .F file.
Alternatively, it may be possible to use some other suffix than .f,
but I've not tried that.
Then f2py file.f
G
n 90 introduced the INTERFACE block, which allows you to use
different variable types as arguments to what appears externally to be
the same routine. It then feeds the arguments to the appropriate
version of the routine. I don't think f2py supports this, but i
I had the same 4 errors in genfromtext yesterday when I upgraded numpy r 7539.
mac os x python 2.5.2.
--George.
2009/10/19 Pierre GM :
>
> On Oct 19, 2009, at 10:40 AM, josef.p...@gmail.com wrote:
>
>> I wanted to finally upgrade my numpy, so I can build scipy trunk
>> again, but I get test fai
2009/9/25 David Huard :
> Hi George,
>
> On Fri, Sep 25, 2009 at 6:55 AM, George Nurser
> wrote:
>>
>> Hi,
>> I hope this is the right place to ask this.
>> I've found the MFDataset works well in reading NetCDF3 files, but it
>> appears that it doesn
ataset for NetCDF4 files sometime?
It would be very useful.
--George Nurser.
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There are some interesting instructions on how to make this work at
http://blog.hyperjeff.net/?p=160.
However I'm not sure that the recommendation to rename the
Apple-supplied version of numpy is consistent with previous advice
I've seen on this mailing list.
--Geo
Thanks for the quick fix.
2009/6/7 David Cournapeau :
> George Nurser wrote:
>> Sorry, I should have said that I'd always deleted the build directories.
>> I now have a better idea about what the problem is.
>>
>> python setup.py config_fc --fcompiler=gnu95
architecture binaries? But I'm
puzzled as to why specifying the fortran compiler should make any
difference -- I understood it isn't used to compile numpy.
--George.
2009/6/7 David Cournapeau :
> George Nurser wrote:
>> running config_fc
>> unifing config_fc, config,
Hi,
the current svn version 7039 isn't compiling for me.
Clean checkout, old numpy directories removed from site-packages..
Same command did work for svn r 6329
[george-nursers-macbook-pro-15:~/src/numpy] agn% python setup.py
config_fc --fcompiler=gnu95 build_clib --fcompiler=gnu95 build_ext
--fco
ries is deep in distutils:
Configuration in numpy/distutils/misc_util.py
George.
2009/1/24 Gideon Simpson :
> That's not working for me. Any thoughts on how to troubleshoot it?
> -gideon
>
> On Jan 24, 2009, at 6:18 PM, George Nurser wrote:
>
>> I did manage to get it working.
I did manage to get it working.
I remember that both libcblas.a (or a link to it) and libacml.so had
to be in the same directory.
Also I had to comment out lines 399-400 of setup.py:
# if ('NO_ATLAS_INFO',1) in blas_info.get('define_macros',[]):
# return None # dotblas
2008/5/21 Pierre GM <[EMAIL PROTECTED]>:
> Mmh, wait a minute:
> * There shouldn't be any mstats.py nor morestats.py in numpy.ma any longer: I
> moved the packages to scipy.stats along their respective unittests.
Right. I hadn't deleted the previous
/Library/Frameworks/Python.framework/Versions/2.
Hmm. I also get some problems with test(all=True)
2 failures (though they look spurious to me) + 18 errors.
Intel MBP, 10.5.2, macPython 2.5.2, apple gcc 4.0.1
George Nurser.
>>> numpy.test(all=True)
Numpy is installed in
/Library/Frameworks/Python.framework/Versions/2.5/lib/pytho
for me. Intel, MBP, 10.5.2.
>>> import numpy
>>> numpy.__version__
'1.1.0rc1'
>>> numpy.test(10)
ran 1005 tests in 2.290s
OK
George Nurser.
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as library himself, either.
I have filed a ticket on this.
Yes, it is the cblas interface from
http://www.netlib.org/blas/blast-forum/cblas.tgz.
Not having to build the interface would indeed make it a whole lot easier.
George Nurser.
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blas be removed for v1.1?
Should I file a bug here?
Regards, George Nurser.
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On 15/11/2007, Timothy Hochberg <[EMAIL PROTECTED]> wrote:
>
>
> On Nov 15, 2007 9:11 AM, Hans Meine <[EMAIL PROTECTED]> wrote:
> > Am Donnerstag, 15. November 2007 16:29:12 schrieb Warren Focke:
> >
> > > On Thu, 15 Nov 2007, George Nurser wrote:
> &
I tried the (as I thought) nice compact form
In [60]: a,b = (zeros((2,)),)*2
But...
In [61]: b[0] = 2
In [62]: a
Out[62]: array([ 2., 0.])
a and b are the _same_ array
But
In [68]: a,b = (zeros((2,)),zeros((2,)))
In [69]: b[0] = 2
In [70]: a
Out[70]: array([ 0., 0.])
is OK. a & b are
svn.scipy.org)
I tried a fresh checkout in a new directory, so the problems can't be here.
Regards, George Nurser.
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I should clear?
Many thanks for loooking at this.
George Nurser.
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tion was closed by server. (http://svn.scipy.org)
2nd try produced 4 more & then died with above error
3rd & 4th just dies with above error.
Any ideas -- is thw problem here or there?
Many thanks, George Nurser.
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Hi Andre,
I've downloaded bpycdf and it works very nicely with numpy; thanks
very much for all your effort.
One small problem; I'm probably being stupid, but I cannot see how to
set a _Fillvalue as Float32.
regards, George Nurser.
On 12/02/07, Andre Gosselin <[EMAIL PROTECTED
ing python, and for
Perhaps compiling python itself with icc might give a useful speedup.
Apparently somebody managed this for python 2.3 in 2003:
http://mail.python.org/pipermail/c++-sig/2003-October/005824.html
--George Nurser.
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