But I guess your second attempt should have worked - submit a bug request imo. On Nov 11, 2013 7:40 AM, "Eduard Antonyan" <[email protected]> wrote:
> I think your last attempt's failure is a bug of the internal cedta > function, but note that if it did work, it'd be more symbols to type than > the anonymous function option :) > On Nov 10, 2013 1:39 PM, "G See" <[email protected]> wrote: > >> Hi, >> >> I have a list of data.tables and I am trying to extract a subset from >> each of them. I can achieve what I want with this: >> >> > L <- list(data.table(BOD), data.table(BOD)) >> > lapply(L, function(x) x[Time==3L]) >> [[1]] >> Time demand >> 1: 3 19 >> >> [[2]] >> Time demand >> 1: 3 19 >> >> However, I'd rather not type have to create an anonymous function. I >> tried the below, but `[.data.frame` is being dispatched. >> >> > lapply(L, "[", Time==3L) >> Error in `[.data.frame`(x, i) : object 'Time' not found >> >> Even if I am explicit, `[.data.table` does not get dispatched: >> >> > lapply(L, data.table:::`[.data.table`, Time==3L) >> Error in `[.data.frame`(x, i) : object 'Time' not found >> >> I'm guessing this is due to where evaluation takes place. Is there an >> alternate syntax I should use? >> >> Thanks, >> Garrett >> _______________________________________________ >> datatable-help mailing list >> [email protected] >> >> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help >> >
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