This module contains a PDL (Perl Data Language) interface to the levmar library. The levmar library contains Levenberg-Marquardt fitting routines (by Manolis Lourakis). Levmar provides a single entry point to twelve routines in the library (plus some utility routines). These routines offer: fitting with numerical or analytic jacobians; single or double precision; no constraints, or linear constraints, or box constraints. See INSTALL for instructions on building and installing and dependencies on external libraries. In brief, you need only a standard PDL installation and lapack and blas shared libraries and headers.