On 6/29/17 11:13 AM, Benoît PELE wrote:
My question is about the factor predictors with several levels. R provides only the pvalues for each level whereas i need an overall pvalue for testing the predictor.
What you ask is provided by anova() -- type I tests, and car::Anova() -- Type II & III tests.
Factors in stepwise methods must be handled specially, to allow all levels to be included/excluded together. I don't know of R software that does this.
HTH -Michael ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
