ANN: PySAL 1.3

Serge Rey sjsrey at
Tue Jan 31 23:02:42 EST 2012

On behalf of the PySAL development team, I'm happy to announce the
official release of PySAL 1.3.

PySAL is a library of tools for spatial data analysis and
geocomputation written in Python. PySAL 1.3, the fourth official
release of PySAL, includes a number of new features and enhancements:

    - The spatial regression module (spreg) has added:
        - Two Stage Least Squares
        - Spatial Two Stage Least Squares
        - GM Error (KP 98-99)
        - GM Error Homoskedasticity (Drukker et. al, 2010)
        - GM Error Heteroskedasticity (Arraiz et. al, 2010)
        - Spatial HAC variance-covariance estimation
        - Anselin-Kelejian test for residual spatial autocorrelation
of residuals from
        IV regression
        - New utility functions and other helper classes
    - A new contrib module to support user contributed modules. The first
      contrib modules are:
        - Weights Viewer – A Graphical tool for examining spatial weights
        - World To View Transform – A class for modeling viewing
windows, used by Weights Viewer
        - Shapely Extension – Exposes shapely methods as standalone functions
        - Shared Perimeter Weights – calculate shared perimeters weights

along with many bug fixes and smaller enhancements.

PySAL modules

    - pysal.core — Core Data Structures and IO
    - — 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
    - pysal.contrib — Contributed Modules

Binary installers and source distributions are available for download at

The documentation site is here

Web sites
PySAL's home is here

The developer's site is here

Mailing Lists
Please see the developer's list here

Help for users is here

Bug reports
To search for or report bugs, please see

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

Many thanks to all who contributed!

Serge, on behalf of the PySAL development team.

Sergio (Serge) Rey
Professor, School of Geographical Sciences and Urban Planning
Arizona State University

Editor, International Regional Science Review

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