Just to be clear, do you really want your 'condition' groups to be be subsets of one another? Most (all?) of the *ply functions assume you want non-overlapping groups so they do a split-summarize-combine sequence. You would have to replace the split part of that.
Bill Dunlap TIBCO Software wdunlap tibco.com On Wed, May 25, 2016 at 3:37 PM, KMNanus <kmna...@gmail.com> wrote: > I have a large dataset, a sample of which is: > > a<- c(“A”, “B”,“A”, “B”,“A”, “B”,“A”, “B”,“A”, “B”) > b <-c(15, 35, 20, 99, 75, 64, 33, 78, 45, 20) > c<- c( 111, 234, 456, 876, 246, 662, 345, 480, 512, 179) > d<- c(1.1, 3.2, 14.2, 8.7, 12.5, 5.9, 8.3, 6.0, 2.9, 9.3) > > df <- data.frame(a,b,c,d) > > I’m trying to construct a data frame that shows the means of c & b based > on the condition of d and grouped by a. > > I want to create the data frame below, then use ggplot2 to create a line > plot of b at various conditions of d. > > I can compute the grouped means (d>=2, d>=4, etc.) one at a time using > dplyr but haven’t figured out how to put them all together or put them in > one data frame. > > I’d rather not use a loop and am relatively new to R. Is there a way i > can use tapply and set it to the conditions above so that I can create the > df below? > > > condition mean(b) mean(c) > A d>=2 ____ _____ > B d>=2 ____ _____ > A d>=4 ____ _____ > B d>=4 ____ _____ > A d>=6 ____ _____ > B d>=6 ____ _____ > > > > Ken > kmna...@gmail.com > 914-450-0816 (tel) > 347-730-4813 (fax) > > > > ______________________________________________ > 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. [[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.