[issue3366] Add gamma and error functions to math module

nirinA raseliarison <[EMAIL PROTECTED]> added the comment: pure Python codes are posted to ASPN: http://code.activestate.com/recipes/576391/ http://code.activestate.com/recipes/576393/ i also rewrote the patch so that they don't use the high_word/low_word macros anymore. Added file: http://bug

[issue3366] Add gamma and error functions to math module

nirinA raseliarison <[EMAIL PROTECTED]> added the comment: i wrote pure Python equivalent of the patch and will post it to the ASPN cookbook as suggested. i'm wondering if i have to upload the code here too, or just the link will suffice? Raymond Hettinger: > Can you also implement blending of a

[issue3366] Add gamma and error functions to math module

Daniel Stutzbach <[EMAIL PROTECTED]> added the comment: On Fri, Jul 25, 2008 at 1:37 PM, Raymond Hettinger <[EMAIL PROTECTED]>wrote: > Raymond Hettinger <[EMAIL PROTECTED]> added the comment: > > Can you also implement blending of approximations: (1-t)*f1(x) + t*f2 > (x) > Is this necessary?

[issue3366] Add gamma and error functions to math module

Raymond Hettinger <[EMAIL PROTECTED]> added the comment: Can you also implement blending of approximations: (1-t)*f1(x) + t*f2 (x) ___ Python tracker <[EMAIL PROTECTED]> ___ __

[issue3366] Add gamma and error functions to math module

nirinA raseliarison <[EMAIL PROTECTED]> added the comment: ouch! i was asleep, at 3AM, when i edited the issue and didn't really know what i was doing. i just see that i removed, instead of edited the mathmodule.diff and didn't check after. so here it is again, with the url for original code adde

[issue3366] Add gamma and error functions to math module

Mark Dickinson <[EMAIL PROTECTED]> added the comment: > I'm +1 on making gamma() be the true gamma function and not carrying > over this brain-damage to Python. +1 from me, too. ___ Python tracker <[EMAIL PROTECTED]> ___

[issue3366] Add gamma and error functions to math module

Daniel Stutzbach <[EMAIL PROTECTED]> added the comment: I think he just carried the names over from C, where: tgamma() is the "true gamma function" lgamma() is the log of the gamma function and gamma() might be tgamma() or lgamma() depending on which C library you use (sigh). I'm +1 on making

[issue3366] Add gamma and error functions to math module

Raymond Hettinger <[EMAIL PROTECTED]> added the comment: Why isn't tgamma() simply named gamma()? The t prefix does nothing for me except raise questions. ___ Python tracker <[EMAIL PROTECTED]> _

[issue3366] Add gamma and error functions to math module

nirinA raseliarison <[EMAIL PROTECTED]> added the comment: Mark Dickinson : > So a full patch for this should touch at least Python/pymath.c, > Modules/mathmodule.c, configure.in, Lib/test/test_math.py, and > Doc/Library/math.rst. here are patches for Python/pymath.c, Modules/mathmodule.c, Lib/

[issue3366] Add gamma and error functions to math module

Changes by nirinA raseliarison <[EMAIL PROTECTED]>: Added file: http://bugs.python.org/file10976/test_math.py.diff ___ Python tracker <[EMAIL PROTECTED]> ___ __

[issue3366] Add gamma and error functions to math module

Changes by nirinA raseliarison <[EMAIL PROTECTED]>: Added file: http://bugs.python.org/file10975/pymath.h.diff ___ Python tracker <[EMAIL PROTECTED]> ___ __

[issue3366] Add gamma and error functions to math module

Changes by nirinA raseliarison <[EMAIL PROTECTED]>: Added file: http://bugs.python.org/file10974/mathmodule.c.diff ___ Python tracker <[EMAIL PROTECTED]> ___ __

[issue3366] Add gamma and error functions to math module

Changes by nirinA raseliarison <[EMAIL PROTECTED]>: Added file: http://bugs.python.org/file10973/pymath.c.diff ___ Python tracker <[EMAIL PROTECTED]> ___ __

[issue3366] Add gamma and error functions to math module

Changes by nirinA raseliarison <[EMAIL PROTECTED]>: Removed file: http://bugs.python.org/file10954/mathmodule.diff ___ Python tracker <[EMAIL PROTECTED]> ___ __

[issue3366] Add gamma and error functions to math module

Raymond Hettinger <[EMAIL PROTECTED]> added the comment: It would be nice if we knew the error bounds for each of the approximation methods. Do we know how the coefficients were generated? When switching from one method to another, it might be nice to have a range where the results slowly blen

[issue3366] Add gamma and error functions to math module

Daniel Stutzbach <[EMAIL PROTECTED]> added the comment: On Mon, Jul 21, 2008 at 5:34 PM, Raymond Hettinger <[EMAIL PROTECTED]> wrote: > There are several different approximations to choose from. Each of > them has their own implications for speed and accuracy. FWIW, the current patch dynamicall

[issue3366] Add gamma and error functions to math module

Raymond Hettinger <[EMAIL PROTECTED]> added the comment: Since we're not in a hurry for Py2.7 and 3.1, I would like to this kicked around a bit on the newsgroup and in numpy forums (personally, I would also post a pure python equivalent to the ASPN cookbook for further commentary). There are

[issue3366] Add gamma and error functions to math module

Mark Dickinson <[EMAIL PROTECTED]> added the comment: Thanks for the patch! I probably won't get to this properly until after 2.6 final, but it won't get lost. It seems like there's pretty good support for adding these functions. By the way, there's already a setup in Python 2.6 (ad 3.0) for

[issue3366] Add gamma and error functions to math module

nirinA raseliarison <[EMAIL PROTECTED]> added the comment: and this is the header. it is stolen from glibc. Added file: http://bugs.python.org/file10955/math_private.h ___ Python tracker <[EMAIL PROTECTED]> _

[issue3366] Add gamma and error functions to math module

nirinA raseliarison <[EMAIL PROTECTED]> added the comment: here is an attempt to make erf, erfc, lgamma and tgamma accessible from math module. erf and erfc are crude translation of the code pointed out by Daniel Stutbach. lgamma is also taken from sourceware.org, but doesn't use the reentrant ca

[issue3366] Add gamma and error functions to math module

Changes by Daniel Stutzbach <[EMAIL PROTECTED]>: -- nosy: +stutzbach ___ Python tracker <[EMAIL PROTECTED]> ___ ___ Python-bugs-list mai

[issue3366] Add gamma and error functions to math module

New submission from Terry J. Reedy <[EMAIL PROTECTED]>: >From Py3000 list: in C99 standard math library, but need code when not yet in particular implementation. Dickinson: open and assign to me Stutzbach: I suggest using the versions from newlib's libm. They contain extensive comments explain