search for: pharmacoepidemiolog

Hi to all R community Does anybody know good R packages/books dedicated to efficient usage of R in pharmacoepidemiological research? Thank you in advance -- Denis Kazakiewicz <d.kazakiewicz at gmail.com>

...unction, rather than the object names. For example, x1 <- 1:4 x2 <- 2:5 x3 <- 3:6 xs <- c("x1", "x2", "x3") If I wanted to cbind(x1, x2, x3) without typing this out, how would I do it? Thanks very much! Jessica Myers Instructor in Medicine Division of Pharmacoepidemiology Brigham and Women's Hospital The information in this e-mail is intended only for the ...{{dropped:7}}

...d formula mismatch in model.matrix() Using a smaller subset of the same covariates, I don't get this error and it doesn't seem to matter which subset of covariates I use. Any help with these problems would be greatly appreciated! Thanks, Jessica Myers Instructor in Medicine Division of Pharmacoepidemiology Brigham and Women's Hospital The information in this e-mail is intended only for the ...{{dropped:7}}