What is going on here? In the lines ending in #### the inputs and outputs are identical yet one gives a warning and the other does not.
a1 <- `rownames<-`(anscombe[1:3, ], NULL) a2 <- anscombe[1:3, ] ix <- 5:8 # input arguments to #### are identical in both cases identical(stack(a1[ix]), stack(a2[ix])) ## [1] TRUE identical(a1[-ix], a2[-ix]) ## [1] TRUE res1 <- data.frame(stack(a1[ix]), a1[-ix]) #### res2 <- data.frame(stack(a2[ix]), a2[-ix]) #### ## Warning message: ## In data.frame(stack(a2[ix]), a2[-ix]) : ## row names were found from a short variable and have been discarded # results are identical identical(res1, res2) ## [1] TRUE -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
