I am beginning to learn the data.table package. At the outset, 'data.table.pdf' states:
It is inspired by A[B] syntax in R where A is a matrix and B is a 2-column matrix. I have used matrices in R but am unfamiliar with the A[B] syntax. When I check the documentation for 'matrix' I find no discussion of such syntax. So this "explanation" is in fact a black hole. Please tell your readers what the package does in such a way that they are not sent on a wild goose chase. For example: The data.table package supports an A[B] syntax where A is a data table, B is a 2 column data table, and the effect of the expression A[B] is... What does A[B] accomplish? Thanks. -- View this message in context: http://r.789695.n4.nabble.com/A-B-tp4689942.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
