Solution is to always use the stringsAsFactors=TRUE option in your data.frame() function calls. --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity.
On November 5, 2015 3:59:10 PM PST, Axel Urbiz <axel.ur...@gmail.com> wrote: >Hello, > >Is there a way to avoid the warning below in dplyr. I’m performing an >operation within groups, and the warning says that the factors created >from each group do not have the same levels, and so it coerces the >factor to character. I’m using this inside a package I’m developing. >I’d appreciate your recommendation on how to handle this. > >library(dplyr) > >set.seed(4) >df <- data.frame(pred = rnorm(100), models = gl(2, 50, 100, labels = >c("model1", "model2"))) > >create_bins <- function (pred, nBins) { > Breaks <- unique(quantile(pred, probs = seq(0, 1, 1/nBins))) >bin <- data.frame(pred = pred, bin = cut(pred, breaks = Breaks, >include.lowest = TRUE)) > bin >} > >res_dplyr <- df %>% group_by(models) %>% do(create_bins(.$pred, 10)) >Warning message: > In rbind_all(out[[1]]) : Unequal factor levels: coercing to character > >Thank you, >Axel. > > > [[alternative HTML version deleted]] > >______________________________________________ >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. ______________________________________________ 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.