https://github.com/dougthor42/pyerf

Pure-Python implementation of the inverse error function.
https://github.com/dougthor42/pyerf

mathematics python statistics

Last synced: 4 days ago
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Pure-Python implementation of the inverse error function.

• Host: GitHub
• URL: https://github.com/dougthor42/pyerf
• Owner: dougthor42
• License: gpl-3.0
• Created: 2017-02-22T18:21:39.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2024-10-08T05:11:49.000Z (3 months ago)
• Last Synced: 2024-12-09T02:43:32.430Z (26 days ago)
• Topics: mathematics, python, statistics
• Language: Python
• Size: 58.6 KB
• Stars: 7
• Watchers: 2
• Forks: 2
• Open Issues: 9
• Metadata Files:
  • Readme: README.rst
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
PyErf

=====

A Pure-Python Error Function and Inverse Error Function Package

---------------------------------------------------------------

|travis| |pypi| |wheels| |pythonversion| |docs|

``pyerf`` is a pure-Python implementation of the error function and

inverse error function using the same functions that SciPy_ uses (namely

parts of the Cephes math library, `cprob/ndtr.c`_ and `cprob/ndtri.c`_).

This is a useful package for when you need to calculate some error fuctions

but you don't want to install all of the SciPy_/NumPy_ stuff.

Usage

-----

You can import the module:

.. code-block:: python

  from pyerf import pyerf

  pyerf.erfinv(0.5)         # 0.476936...

  pyerf.erf(0.5)            # 0.5204998...

  pyerf.erfc(0.5)           # 0.4795001...

or the package:

.. code-block:: python

  import pyerf

  pyerf.erfinv(0.5)         # 0.476936...

  pyerf.erf(0.5)            # 0.5204998...

  pyerf.erfc(0.5)           # 0.4795001...

or only a specific function:

.. code-block:: python

  from pyerf import erfinv as inverse_error_function

  inverse_error_function(0.5)       # 0.476936...

and lastly, you can even use ``import *`` (but that's no longer considered

very Pythonic as it pollutes the namespace):

.. code-block:: python

  from pyerf import *

  erfinv(0.5)         # 0.476936...

  erf(0.5)            # 0.5204998...

  erfc(0.5)           # 0.4795001...

Changelog

---------

See `CHANGELOG.md`_.

.. Images and Links

.. |travis| image:: https://travis-ci.org/dougthor42/PyErf.svg?branch=master

  :target: https://travis-ci.org/dougthor42/PyErf

  :alt: Travis-CI (Linux, Max)

.. |pypi| image:: https://img.shields.io/pypi/v/pyerf.svg

  :target: https://pypi.python.org/pypi/pyerf/

  :alt: Latest PyPI version

.. |wheels| image:: https://img.shields.io/pypi/wheel/pyerf.svg

  :target: https://pypi.python.org/pypi/pyerf/

  :alt: Python Wheels

.. |pythonversion| image:: https://img.shields.io/pypi/pyversions/pyerf.svg

  :target: https://pypi.python.org/pypi/pyerf/

  :alt: Supported Python Versions

.. |docs| image:: https://img.shields.io/badge/docs-pythonhosted-brightgreen.svg

  :target: https://pythonhosted.org/pyerf

  :alt: Documentation Status

.. _`CHANGELOG.md`: https://github.com/dougthor42/PyErf/blob/master/CHANGELOG.md

.. _`cprob/ndtr.c`: https://github.com/jeremybarnes/cephes/blob/master/cprob/ndtr.c

.. _`cprob/ndtri.c`: https://github.com/jeremybarnes/cephes/blob/master/cprob/ndtri.c

.. _SciPy: https://www.scipy.org/

.. _NumPy: http://www.numpy.org/