On behalf of the PySAL development team, I'm happy to announce the official release of PySAL 1.4. PySAL is a library of tools for spatial data analysis and geocomputation written in Python. PySAL 1.4, the fifth official release of PySAL brings the following key enhancements:    -  spatial regression (spreg): - Integration of scipy.sparse structures in all the regression classes - Probit - Probit with diagnostics for spatial effects   -  exploratory spatial data analysis (esda): - Generalized Gamma statistics for spatial autocorrelation   -  spatial dynamics (spatial_dynamics): - O(n log n) algorithm for spatial tau (spatial rank correlation) - LISA Markov transitions and tests for spatial dynamics   - computational geometry (cg) and spatial networks - efficient point to nearest LineSegment search - generate network topology from shapefiles - utilities for interfacing with networkx - integration of network cluster code (beta) among the 155 commits and bug fixes since the last release, 6 months ago. 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 -------------- Binary installers and source distributions are available for download at http://code.google.com/p/pysal/downloads/list Documentation ------------- The documentation site is here http://pysal.geodacenter.org/1.4 Web sites --------- PySAL's home is here http://pysal.org/ The developer's site is here http://code.google.com/p/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 http://code.google.com/p/pysal/issues/list 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. -- Sergio (Serge) Rey Professor, School of Geographical Sciences and Urban Planning GeoDa Center for Geospatial Analysis and Computation Arizona State University http://geoplan.asu.edu/rey Editor, International Regional Science Review http://irx.sagepub.com