Excellent. Thank you both!
-----Original Message----- From: Matthew Dowle [mailto:[email protected]] On Behalf Of Matthew Dowle Sent: Tuesday, February 08, 2011 1:53 PM To: Steve Lianoglou; Damian Betebenner Cc: [email protected] Subject: Re: [datatable-help] Question on inconsistent behavior test.data.table() has the same issue. There was a thread on r-devel recently when somebody asked a very similar question about another package, unrelated to data.table. Core was basically saying NOTES were fine. They got very specific that they are *not* warnings but NOTES! :-) They don't prevent the package being accepted on CRAN. However, I'm like you and prefer to have "OK" all the way down the CRAN results page. That way users really do know it's fine (quickly). So in test.data.table I just put a line of variables near the top to keep R CMD check quiet. It's only as bad as declaring variables in something like C anyway. Actually it's quite nice...I've found and fixed a few problems that way. See top of test.data.table. The difference between DT[,SCORE] and DT[,list(SCORE)] is covered by FAQ 1.3. At the top of your function just put in a SCORE=NULL. On Tue, 2011-02-08 at 13:26 -0500, Steve Lianoglou wrote: > Hi, > > On Tue, Feb 8, 2011 at 1:19 PM, Damian Betebenner <[email protected]> > wrote: > > All, > > > > In using data.table within a package I develop, I’m trying to avoid those > > pesky warnings about variables not having a binding. Because data.table > > scopes within the existing frame and code.tools isn’t smart enough to detect > > > > that, I’m getting a few of those pesky errors. > > > > > > > > This brought me to the following inconsistent behavior (at least it appears > > that way to me): > > > > > > > > tmp.dt <- data.table(ID=1:10, SCORE=rnorm(10)) > > > > > > > > tmp.dt[,SCORE] > > > > > > > > and > > > > > > > > tmp.dt[,”SCORE”, with=FALSE] > > > > > > > > The first returns a numeric vector whereas the second produces a > > data.table/data.frame with a single column. The second avoids those pesky > > warnings about unbound variables but I’d prefer to get the result provided > > by the > > How about: > > R> tmp.dt$SCORE > R> tmp.dt[['SCORE']] > > -steve > _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
