> On 28 Mar 2017, at 16:14 , Sören Vogel <soeren.vo...@posteo.ch> wrote: > > Hello > > Ho can I apply a formula to a data frame?
That would depend on whether the formula has any special interpretation. If if is just an elementary expression, then it would be like eval(For1[[3]], Data, environment(For1)) but you are using "." to represent... what exactly? One possibility is model.matrix(For1, Data) but I'm not at all sure that that is what you want. -pd > > library("formula.tools") > Data <- data.frame("v1" = rnorm(31), "v2" = runif(31), "v3" = sample(1:7, 31, > repl=T), "v4" = rlnorm(31)) > For1 <- as.formula(v1 ~ .^3) > Lhs <- Data[, formula.tools::lhs.vars(formula)] > Rhs <- apply_formula_to_data_frame_and_return_result(data, formula) # ??? > > Thank you, > Sören > > ______________________________________________ > 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. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ 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.