Ok I see that. Please raise a bug report for this one. Thanks. On Sun, 2011-12-04 at 05:07 -0600, Damian Betebenner wrote: > All, > > > > Finding some inconsistent behaviors in how data.table deals with > variable assignment depending upon whether a $ or [[ ]] is used. > > I’m using data.table 1.7.4 > > > > > > > > require(data.table) > > > > ### Using $ > > > > tmp.dt <- data.table(X=1:5) > > tmp.dt$Y <- factor(1, levels=1:2, labels=c(“VALID_CASE”, > “INVALID_CASE”)) > > > > > tmp.dt > > X Y > > [1,] 1 1 > > [2,] 2 1 > > [3,] 3 1 > > [4,] 4 1 > > [5,] 5 1 > > > > > sapply(tmp.dt, class) > > X Y > > "integer" "integer" > > > > ### Using [[ > > > > tmp.dt <- data.table(X=1:5) > > tmp.dt[[“Y”]] <- factor(1, levels=1:2, labels=c(“VALID_CASE”, > “INVALID_CASE”)) > > > > > tmp.dt > > X Y > > [1,] 1 VALID_CASE > > [2,] 2 VALID_CASE > > [3,] 3 VALID_CASE > > [4,] 4 VALID_CASE > > [5,] 5 VALID_CASE > > > sapply(tmp.dt, class) > > X Y > > "integer" "factor" > > > > > > Thoughts, > > > > Damian > > > _______________________________________________ > datatable-help mailing list > [email protected] > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
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