In the FAQ, the X[Y] syntax is first mentioned in item 1.11, where it is not explained and no example of its use is provided.
In item 1.12, X[Y] is compared to merge, again without any attempt to explain what X[Y] is or does, and with no examples of its use. Also, merge is not discussed correctly: "...the number of rows returned by merge(X,Y) and merge(Y,X) is the same." This can be controlled by the merge arguments by.x, by.y. I suggest that before discussing the in's and out's of the X[Y] syntax the FAQ explain what it is and provide examples of its use. Think of it as "X[Y] for Dummies". As things stand the FAQ are completely useless for getting a grip on X[Y] and it is very frustrating to encounter explanations of a concept that has nowhere been introduced or illustrated. -- View this message in context: http://r.789695.n4.nabble.com/A-B-tp4689942p4691793.html Sent from the datatable-help mailing list archive at Nabble.com. _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
