On Dec 12, 2008, at 11:14 AM, Marc Marí Dell'Olmo wrote:
Hello all, Does anyone know if there exists any function in R that resembles the "lincom" and "nlcom" of STATA?. These functions computes point estimates, standard errors, significance levels, confidence intervals, etc. for linear and non linear combinations of previous estimated parameters. Down here you've got links to descriptions of the functions of STATA nlcom: http://www.stata.com/help.cgi?nlcom lincom: http://www.stata.com/help.cgi?lincom
I did not find a description of the mathematical operations that let me understand exactly what lincom is doing, but suspect that you should be looking at how R handles contrasts. The help pages reference ch 2 of "Statistical Models in S". The search at the console prompt would be:
?C ?contrasts ?se.contrast ?model.tables
Thank you, Marc ______________________________________________ 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.
______________________________________________ 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.
