Also why should that difference result in different behavior? On Tue, Nov 14, 2023 at 9:38 AM Gabor Grothendieck <ggrothendi...@gmail.com> wrote: > > In that case identical should be FALSE but it is TRUE > > identical(a1, a2) > ## [1] TRUE > > > On Tue, Nov 14, 2023 at 8:58 AM Deepayan Sarkar > <deepayan.sar...@gmail.com> wrote: > > > > They differ in whether the row names are "automatic": > > > > > .row_names_info(a1) > > [1] -3 > > > .row_names_info(a2) > > [1] 3 > > > > Best, > > -Deepayan > > > > On Tue, 14 Nov 2023 at 08:23, Gabor Grothendieck > > <ggrothendi...@gmail.com> wrote: > > > > > > 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 > > > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com
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