galts (1.1)

Genetic algorithms and C-steps based LTS (Least Trimmed Squares) estimation.

http://cran.r-project.org/web/packages/galts

This package includes the ga.lts function that estimates LTS (Least Trimmed Squares) parameters using genetic algorithms and C-steps. ga.lts() constructs a genetic algorithm to form a basic subset and iterates C-steps as defined in Rousseeuw and van-Driessen (2006) to calculate the cost value of the LTS criterion. OLS(Ordinary Least Squares) regression is known to be sensitive to outliers. A single outlying observation can change the values of estimated parameters. LTS is a resistant estimator even the number of outliers is up to half of the data. This package is for estimating the LTS parameters with lower bias and variance in a reasonable time.

Maintainer: Mehmet Hakan Satman
Author(s): Mehmet Hakan Satman

License: GPL

Uses: DEoptim, genalg

Released about 8 years ago.