This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (pypi.python.org).
Help us improve Python packaging - Donate today!

Ziggurat Fast Normal Distribution RNG

Project Description
# zignor-python

Ziggurat normal random number generator ported to Python

## Requirement

`NumPy` installation is required. Python 3 compatible.

## Installation

To install, run

`python setup.py install`

or you can install from PyPI:

`pip install zignor`

If you are running Windows and don't have MSVC compiler installed, a pre-built distribution on Python 3.5 is given in `dist` folder.

## Usage

It will automatically import `NumPy`, so you can just use

```
import zignor
zignor.randn(10)
```
or
```
zignor.randn(3, 5)
```
to generate a matrix of 3 by 5.

## More functions

This module includes two implementations. One is an slightly modified implementation of the original Ziggurat method ([http://www.jstatsoft.org/article/downloadSuppFile/v005i08/rnorrexp.c](http://www.jstatsoft.org/article/downloadSuppFile/v005i08/rnorrexp.c)). It uses SHR3 as the RNG for uniform distribution. This is the code behind `zignor.randn()` and `zignor.rnor()` method, and it is the faster of the two.

We also included a `zignor.rexp()` for generation exponential distribution.

The other implementation is the VIZIGNOR implementation by Doornik, J.A. It improves the original method and uses MWC8222 RNG to enable the method to pass some more tests. This method can be called by `zignor.zignor()`.

## References
1. G. Marsaglia and W.W. Tsang: The Ziggurat Method for Generating Random Variables. *Journal of Statistical Software*, vol. 5, no. 8, pp. 1–7, 2000.
2. Doornik, J.A. (2005), "An Improved Ziggurat Method to Generate Normal Random Samples", mimeo, Nuffield College, University of Oxford.



Release History

Release History

This version
History Node

0.1.8

History Node

0.1.7

Download Files

Download Files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
zignor-0.1.8.zip (11.6 kB) Copy SHA256 Checksum SHA256 Source Apr 18, 2016

Supported By

WebFaction WebFaction Technical Writing Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Rackspace Rackspace Cloud Servers DreamHost DreamHost Log Hosting