Dear R and hydrological/environmental community, I would like to draw your attention to hydroPSO, a newly developed R package for the calibration/optimisation of (complex) environmental models. hydroPSO implements a state-of-the-art Particle Swarm Optimisation (PSO) algorithm, which is a global optimisation technique with a surge of attention given its flexibility, ease of implementation and efficiency. Key features of hydroPSO are: 1) Model-independent calibration engine 2) Platform-independent (GNU/Linux, Windows, Mac OS X) 3) Minimal user intervention to define I/O functions for interfacing hydroPSO with the model code 4) Several fine-tuning options to customise the calibration engine (for advanced PSO users) 5) Sensitivity analysis included, using the Latin Hypercube One-factor-At-a-Time (LH-OAT) 6) Several functions for post-processing of the calibration results hydroPSO and its user manual are already available on CRAN: http://cran.r-project.org/web/packages/hydroPSO/ you can install it with: > install.packages("hydroPSO") This package includes a vignette (tutorial) showing how to calibrate SWAT-2005 (http://swatmodel.tamu.edu/software/swat-model/) and MODFLOW-2005 (http://water.usgs.gov/nrp/gwsoftware/modflow2005/modflow2005.html) for real-world case studies. You can download the vignette and all the files required to follow the two case studies from: http://www.rforge.net/hydroPSO/ For assistance/bugs, report/comments, contact/collaboration do not hesitate to contact the authors: Mauricio Zambrano-Bigiarini <mzb.devel [at] gmail.com> Rodrigo Rojas <Rodrigo.RojasMujica [at] gmail.com> Kind regards, Mauricio Zambrano-Bigiarini, PhD PS, I apologise for any possible cross-posting
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