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
