PySAL 1.6 Released (2013 07 31)

Sergio Rey edited this page Jul 31, 2013 · 2 revisions

On behalf of the PySAL development team, I'm happy to announce the official release of PySAL 1.6.

PySAL is a library of tools for spatial data analysis and geocomputation written in Python. PySAL 1.6, the seventh official release of PySAL brings the following key enhancements:

Spatial weights (weights)

  • Optimized contiguity builder
  • Explicit checks for disconnected observations (islands)
  • Lightweight sparse weights class
  • Handle coincident points in construction of distance based weights
  • Optimized construction of knn weights

Spatial regression (spreg)

  • Chow test on spatial autoregressive coefficient in error, lag and combination regime models
  • Kernel based weights specialized for HAC estimators
  • Group-wise heteroskedasticity correction for OLS models with regimes
  • Optimal GMM estimator to account for heteroskedasticity in TSLS models with regimes

Spatial inequality (inequality)

  • Spatial decomposition of the Gini coefficient

Computational geometry (cg)

  • Robust segment intersection tests

among the 246 commits and bug fixes since the last release, 6 months ago.

In addition, 1.6 marks the first release since PySAL moved from Google Code to GitHub

PySAL modules

* pysal.core — Core Data Structures and IO
* pysal.cg — Computational Geometry
* pysal.esda — Exploratory Spatial Data Analysis
* pysal.inequality — Spatial Inequality Analysis
* pysal.spatial_dynamics — Spatial Dynamics
* pysal.spreg - Regression and Diagnostics
* pysal.region — Spatially Constrained Clustering
* pysal.weights — Spatial Weights
* pysal.FileIO — PySAL FileIO: Module for reading and writing various file types in a Pythonic way

Downloads

Source distributions are available at http://pypi.python.org/pypi/PySAL

Binary installers are availble from the GeoDa Center for Geospatial Analysis and Computation

PySAL can also be installed with pip or easy_install.

Documentation

The documentation site is here http://pythonhosted.org/PySAL/

Web sites

PySAL's home is here http://pysal.org/

The developer's site is here https://github.com/pysal/pysal

Mailing Lists

Please see the developer's list here http://groups.google.com/group/pysal-dev

Help for users is here http://groups.google.com/group/openspace-list

Bug reports and feature requests

To search for or report bugs, as well as request enhancements, please see https://github.com/pysal/pysal/issues

License information

See the file "LICENSE.txt" for information on the history of this software, terms & conditions for usage, and a DISCLAIMER OF ALL WARRANTIES.

Many thanks to all who contributed!

Serge, on behalf of the PySAL development team.