on Mon, 21 Jul 2008 08:46:03 -0500
"Daniel Stutzbach" wrote:
> Also, the patch doesn't include the extensive comments in the original
> code that explain the mathematics. Including a URL in the patch would
> at least allow someone to find those comments.
i rearranged the patches so that they are
On Mon, Jul 21, 2008 at 8:16 AM, nirinA raseliarison
<[EMAIL PROTECTED]> wrote:
> Terry Reedy
>> I'm interested also. Done and done.
>> http://bugs.python.org/issue3366
> patch is submitted. it is tested only on linux-2.6.26
> with gcc-4.3.1.
Thanks for doing this. In the patch, wouldn't it be g
Terry Reedy
> I'm interested also. Done and done.
> http://bugs.python.org/issue3366
patch is submitted. it is tested only on linux-2.6.26
with gcc-4.3.1.
Raymond Hettinger
> Discussions of "my approximation is better/faster/etc than yours"
> can be interminable.
> Recommend you put together your
On Wed, Jul 16, 2008 at 5:03 PM, nirinA raseliarison
<[EMAIL PROTECTED]> wrote:
> my initial motivation is to make these functions accessible,
> with just a few lines of additionnal code. that's so simple
> with a linux box!
As Daniel Stutzbach already hinted, the easiest way to just get at the
sy
On Wed, Jul 16, 2008 at 11:04 AM, nirinA raseliarison
<[EMAIL PROTECTED]> wrote:
> Daniel Stutzbach wrote:
>> http://sourceware.org/cgi-bin/cvsweb.cgi/~checkout~/src/newlib/libm/math/s_erf.c?rev=1.1.1.1&cvsroot=src
>
> a personnal view here. i'm always perplex when there
> are many magic numbers in
On Wed, Jul 16, 2008 at 5:03 PM, nirinA raseliarison
<[EMAIL PROTECTED]> wrote:
> with the gamma from gcc under linux,
> which uses the MPFR library,
Are you sure it uses MPFR? I thought that for gcc 4.3, MPFR was used only for
compile-time constant expressions. For a call to tgamma whose argume
on Tue, 15 Jul 2008 08:32:02 -0500
Daniel Stutzbach wrote:
> I suggest using the versions from newlib's libm. They contain
> extensive comments explaining the math and have a generous license,
> e.g.,:
>
> http://sourceware.org/cgi-bin/cvsweb.cgi/~checkout~/src/newlib/libm/math/s_erf.c?rev=1.1.1.
From: "nirinA raseliarison" <[EMAIL PROTECTED]>
>>> from test.test_random import gamma
. . .
there is a simple implementation in Python at:
http://en.wikipedia.org/wiki/Lanczos_approximation
with coefficients slightly different from those in
test_random.py, one gets:
. . .
with the gamma from
on Tue, 15 Jul 2008 09:27:39 +0100
Mark Dickinson wrote:
> Writing explicit code for these functions, for platforms
> whose libm doesn't support them, would be a fairly major task.
> Stealing code (in an appropriately legal fashion) from somewhere
> else might work.
> In any case, if you're inter
on Tue, 15 Jul 2008 01:39:19 -0700
Raymond Hettinger wrote:
> In the meantime, here's a little cheat:
>
> >>> from test.test_random import gamma
> >>> gamma(4)
> 5.9982
> >>> gamma(5)
> 24.0
> >>> gamma(6)
> 120.03
> >>> gamma(6.1)
> 142.45194406567856
there is a simple im
Mark Dickinson wrote:
In any case, if you're interested in getting these in to 2.7/3.1 (it's too
late for 2.6/3.0) then I'd suggest opening a feature request at
bugs.python.org. (And assign it to me, if you like.)
I'm interested also. Done and done.
http://bugs.python.org/issue3366
__
On Tue, Jul 15, 2008 at 3:27 AM, Mark Dickinson <[EMAIL PROTECTED]> wrote:
> One reason is that they're probably not available on all platforms;
> these functions
> are part of the C99 standard, and not everyone has caught up with all the
> little
> details of C99 yet. In particular, I wouldn't b
- Original Message -
From: "Mark Dickinson" <[EMAIL PROTECTED]>
To: "nirinA raseliarison" <[EMAIL PROTECTED]>; "python-3000"
Sent: Tuesday, July 15, 2008 1:27 AM
Subject: Re: [Python-3000] adding gamma and error functions to math module
On Tue, Jul 15, 2008 at 9:10 AM, nirinA raseliarison
<[EMAIL PROTECTED]> wrote:
> gammas and errors functions are available from the C standard
> library. it would be nice to have them in the math module.
> or is there any reason not to include them?
One reason is that they're probably not availab
gammas and errors functions are available from the C standard
library. it would be nice to have them in the math module.
or is there any reason not to include them?
diff -u1 /usr/local/src/Python-3.0b1/Modules/mathmodule.c mathmodule.c
--- /usr/local/src/Python-3.0b1/Modules/mathmodule.c2008-
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