Lagrange is a Python package implementing likelihood models for geographic range evolution on phylogenetic trees, with methods for inferring rates of dispersal and local extinction and ancestral ranges.

This software implements methods described in Ree, R H and S A Smith. 2008. Maximum likelihood inference of geographic range evolution by dispersal, local extinction, and cladogenesis. Systematic Biology 57(1):4-14.

See also Ree, R H, B R Moore, C O Webb, and M J Donoghue. 2005. A likelihood framework for inferring the evolution of geographic range on phylogenetic trees. Evolution 59(11):2299-2311

Analyses are currently run as Python scripts that use the lagrange API, but we intend to create a more user-friendly interface for basic analyses.

For help running lagrange, contact Rick Ree or Stephen Smith.

System requirements

• Python 2.4 or newer
• Scipy - scientific libraries for python
• for Debian Linux and derivatives, e.g. Ubuntu:

sudo apt-get install python-scipy

• for Mac OS X: see the InstallationMac page
• for Windows: installers available from Sourceforge