On Sun, 2006-12-31 at 13:23 -0600, [EMAIL PROTECTED] wrote:
> rrenaud> Is there a reason why erf() is not included in the math
> rrenaud> package? According to the following URL it looks like it has
> rrenaud> been standard C since 1999.
>
> Python is implemented in the C89 dialect. Maybe Python 3.0 will be
> implemented using C99.
In the meantime, you could:
1) Patch mathmodule.c to add the missing function(s), or
2) Make a small extension module that exposes the missing function(s),
or
3) Use ctypes to access libm directly. Something along the lines of
this:
>>> from ctypes import *
>>> libm = CDLL("libm.so")
>>> libm.erf.restype = c_double
>>> libm.erf(c_double(0))
0.0
>>> libm.erf(c_double(1))
0.84270079294971489
>>> libm.erf(c_double(2))
0.99532226501895271
Hope this helps,
Carsten.
--
http://mail.python.org/mailman/listinfo/python-list
