(This article was first published on V. » R, and kindly contributed to R-bloggers)
?relevel
: The levels of a factor are re-ordered so that the level specified
by ‘ref’ is first and the others are moved down. This is useful
for ‘contr.treatment’ contrasts which take the first level as the
reference.
To leave a comment for the author, please follow the link and comment on his blog: V. » R.
R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
