All, Interesting question. Any views?
http://stackoverflow.com/questions/12773822/why-does-xy-join-of-data-tables-not-allow-a-full-outer-join-or-a-left-join It's X[Y,j,merge=TRUE] (i.e. when j is present and inspected for the columns it uses, combined with merge=TRUE) that I can see being useful, perhaps. Matthew _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
