Isn't rbindlist(myList) faster than do.call(rbind, myList)? Garrett
On Sat, Nov 9, 2013 at 11:33 AM, Arunkumar Srinivasan <[email protected]> wrote: > GSee, I find this a bit confusing at the moment as well - the convergence of > "rbind" and "rbindlist" and therefore the future of "rbindlist". > > `rbindlist` gained speed (to some extent) by assuming things like this and > skipping checks in the first place. So, should we include checks like this? > Also, if "rbind" and/or "rbindlist" are made to do the exact same thing, > then, what's the purpose of "rbindlist"? > > Any thoughts? > > Arun > > On Saturday, November 9, 2013 at 6:29 PM, Eduard Antonyan wrote: > > Fyi, it's not well documented, but setting use.names=FALSE in rbind would > replicate rbindlist behavior. > > I think it's a reasonable FR - if/when all of rbind code goes into C, it > would be trivial to add. > > On Nov 9, 2013 10:51 AM, "G See" <[email protected]> wrote: > > Hi, > > Please note the inconsistency between the behavior of rbind() and > rbindlist() below. > > m1 <- as.data.table(mtcars) > m2 <- copy(m1) > rbind(m1[, .SD[1], by=cyl], m2) # Gives warning and binds by name > rbindlist(list(m1[, .SD[1], by=cyl], m2)) # no warning, and does NOT > bind by name > > What do you think about making them have the same behavior and/or > warning? Personally, I prefer the behavior of rbind(), and would > prefer to see a warning if column names are ignored like they are with > rbindlist(). > > Thanks, > Garrett > _______________________________________________ > 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 > > _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
