diff options
| author | Raymond Hettinger <python@rcn.com> | 2011-01-25 06:58:01 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2011-01-25 06:58:01 (GMT) |
| commit | 2f707c98fbace947219d05a4b1ab37abd63e0e96 (patch) | |
| tree | 6fa16b1f175c56cc1259ae0dcb3bc777b433ab49 /Doc | |
| parent | f9b8a19d75d7577017e001a8cd61f5b95e2fa694 (diff) | |
| download | cpython-2f707c98fbace947219d05a4b1ab37abd63e0e96.zip cpython-2f707c98fbace947219d05a4b1ab37abd63e0e96.tar.gz cpython-2f707c98fbace947219d05a4b1ab37abd63e0e96.tar.bz2 | |
Add math.erfc and turtledemo.
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/whatsnew/3.2.rst | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst index 5bef1ac..b96132a 100644 --- a/Doc/whatsnew/3.2.rst +++ b/Doc/whatsnew/3.2.rst @@ -993,10 +993,15 @@ of nearly equal quantities: 0.013765762467652909 The :func:`~math.erf` function computes a probability integral or `Gaussian -error function <http://en.wikipedia.org/wiki/Error_function>`_: +error function <http://en.wikipedia.org/wiki/Error_function>`_. The +complementary error function, :func:`~math.erfc`, is ``1 - erf(x)``: >>> erf(1.0/sqrt(2.0)) # portion of normal distribution within 1 standard deviation 0.682689492137086 +>>> erfc(1.0/sqrt(2.0)) # portion of normal distribution outside 1 standard deviation +0.31731050786291404 +>>> erf(1.0/sqrt(2.0)) + erfc(1.0/sqrt(2.0)) +1.0 The :func:`~math.gamma` function is a continuous extension of the factorial function. See http://en.wikipedia.org/wiki/Gamma_function for details. Because @@ -1967,6 +1972,16 @@ parameters, the return types will also be an ASCII-encoded byte strings: (Work by Nick Coghlan, Dan Mahn, and Senthil Kumaran in :issue:`2987`, :issue:`5468`, and :issue:`9873`.) +turtledemo +---------- + +The demonstration code for the :mod:`turtle` module was moved from the *Demo* +directory to main library. It includes over a dozen sample scripts with +lively displays. Being on :attr:`sys.path`, it can now be run directly +from the command-line:: + + $ python -m turtledemo + Multi-threading =============== @@ -2166,7 +2181,7 @@ members of the community to create and share external changesets. See :pep:`385` for details. To learn to use the new version control system, see the `tutorial by Joel -Spolsky <http://hginit.com>`_ or the `guide to Mercurial workflows +Spolsky <http://hginit.com>`_ or the `Guide to Mercurial Workflows <http://mercurial.selenic.com/guide/>`_. |