I think I'm a +1 on doing the xref (like data.frame does), but emitting a warning when it is done .. unlike data.frame.rbind, which just does it silently ...
-steve On Sun, Oct 23, 2011 at 8:08 PM, Matthew Dowle <[email protected]> wrote: > Ah. Then I think that was deliberate at the time. I sometimes mislabel > column names and want R to warn me rather than doing silent cross-ref. > Other times I just think in terms of column order and am not too > concerned with the names. I don't mind changing it to do cross ref for > consistency but would like to keep the warning. Views? > > On Sun, 2011-10-23 at 14:35 -0400, Steve Lianoglou wrote: >> I think he means that running data.frame.rbind on these: >> >> R> d1 <- data.frame(a=1:10, b=11:20) >> R> d2 <- data.frame(b=101:120, a=21:30) >> R> rbind(d1, d2) >> >> Will "cross ref" the "a" and "b" columns and stack them correctly on >> top of each other. >> >> Doing the same with two data.table will bind the two together, but >> won't do the cross-ref. It just gives you a warning that the names >> didn't match, but rbind's the first to the first, and the second to >> the second (columns) anyway. >> >> -steve >> >> On Sun, Oct 23, 2011 at 2:19 PM, Matthew Dowle <[email protected]> >> wrote: >> > Hi. Not sure what you mean, example needed please. Is that with v1.7.1 now >> > on CRAN? There has been some to and fro on chind/rbind in last few >> > versions. >> > >> >> Hi Matthew, >> >> >> >> Not sure if this is planned or inadvertent, but rbind matches up named >> >> columns with data.frames but doesn't with data.table (data.table does give >> >> the friendly warning). >> >> >> >> Thanks as always for your excellent package, >> >> >> >> Damian >> >> >> >> >> >> _______________________________________________ >> >> datatable-help mailing list >> >> [email protected] >> >> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help >> > >> > >> > _______________________________________________ >> > datatable-help mailing list >> > [email protected] >> > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help >> > >> >> >> > > > -- Steve Lianoglou Graduate Student: Computational Systems Biology | Memorial Sloan-Kettering Cancer Center | Weill Medical College of Cornell University Contact Info: http://cbio.mskcc.org/~lianos/contact _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
