`model.matrix` was what I was looking for. Thanks, Sören
> On 28.03.2017, at 16:57, peter dalgaard <pda...@gmail.com> wrote: > > >> 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.