Dr. Ligges: Thank you for the prompt reply. I am sorry that I did not include my code. I submitted my post as I was running to a meeting and did not have time to provide more detail. Given the information you provided, I was able to access the coefficient vector.
-- Jim 2011/4/19 Uwe Ligges <lig...@statistik.tu-dortmund.de>: > > > On 18.04.2011 23:41, James Shaw wrote: >> >> 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. > > > Where is the reproducible code that the posting guide asks you to send with > your question? > > >> 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. > > It does, ask R to > > str(object) > > and you will see that it is an S4 object that contains a slot coefficients > and you can get those by > > object@coefficients > > the package maintainer of the package may want to provide a coef() method or > something similar. > > > >> 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. > > You have not even sent the error message, nor the versions of Java, and the > involved packages. > > Uwe Ligges > > > >> -- >> 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. > -- 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.
