I am using robreg.evol (part of the RFreak package) to fit models via least trimmed squares (LTS) regression and am encountering the following error message when attempting to access the coefficients:
Error in fit1$coef : $ operator not defined for this S4 class. It appears to me that robreg.evol is not saving the estimates in a form that can be accessed following estimation. According to documentation for RFreak, the function is supposed to return an object of class "evolreg" that contains the parameter estimates. I am uncertain whether the error I am receiving is related to to the version of R being used. I receive the error message when using R version 2.12.1. When using the latest version of R, i.e., 2.13, I receive a Java error message and cannot get RFreak to work at all. -- Jim James W. Shaw, Ph.D., Pharm.D., M.P.H. Assistant Professor Department of Pharmacy Administration College of Pharmacy University of Illinois at Chicago 833 South Wood Street, M/C 871, Room 266 Chicago, IL 60612 Tel.: 312-355-5666 Fax: 312-996-0868 Mobile Tel.: 215-852-3045 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
