?predict Have you read An Inrtroduction to R?
-- Bert On Wed, Oct 10, 2012 at 6:49 AM, Sigrid <s.stene...@gmail.com> wrote: > I’m entirely stumped on this particular issue and really hoping someone has > some advice for me. > > I am running a covariant model in lm I would like to give the standard > errors or the confidence intervals for the fitted lines. I’ve been using the > dataset OrangeSprays where I want lines for each level of treatment over the > covariant ‘colpos’. I’ve been able to calculate intercepts and slopes for > each lines by adding up the parameters, but this does not make sense when > the comes to the se’s. I’ve run the summary (model) function, but only get > the differences in standard error between lines. Also by running > confint(model), I have the same problem. > > How can I get standard error per or the CI-interval for each fitted line? > I’ve attached the coding underneath. > > Thank you, > Sigrid > >> data(OrchardSprays) >> model<-lm(decrease~rowpos+colpos+treatment+treatment:colpos) >> summary(model) > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/se-s-and-CI-s-for-fitted-lines-in-multivariate-regression-analysis-tp4645703.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.
