You can avoid the warnings and the unneeded calls to FUN by adding drop=TRUE to the call to ave(), since all of its ... arguments are passed to interaction (I think).
In TERR we dealt with this problem by adding drop=TRUE to ave's argument list and we pass ... and drop=drop to interaction. I'm not sure drop=FALSE is ever desirable. Bill Dunlap TIBCO Software wdunlap tibco.com On Wed, Jun 14, 2017 at 6:02 AM, Therneau, Terry M., Ph.D. < thern...@mayo.edu> wrote: > Consider the following simple data set and a call to ave: > > > tdata <- data.frame(f1=c(1,1,1,1,2,2,2,2), f2=c(1,2,1,2,1,1,1,1), y=1:8) > > with(tdata, table(f1, f2)) > f2 > f1 1 2 > 1 2 2 > 2 4 0 > > > with(tdata, ave(y, f1, f2, FUN=max)) > > [1] 3 4 3 4 8 8 8 8 > Warning message: > In FUN(X[[i]], ...) : no non-missing arguments to max; returning -Inf > > There are no missing values in the result. The fact that ave() apparently > tried to find the max for a combination it did not need is irrelvant to the > user, and the warning is counterproductive. > > Terry T. > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
