Dear Mike, As a slight simplification, a legal R name can start with a period (.), upper- or lower-case letter (A-Z, a-z), and can contain periods, underscores (_), letters, and numerals; depending upon the locale, some other characters may also be allowed. This information *is* in the R manuals, though it might not be that easy to locate: See section 10.3.2 of the R Language Definition manual or 1.8 of the Introduction to R manual.
@ is used to access slots in an S4 object. I hope this helps, John > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Mike Miller > Sent: March-26-09 9:04 PM > To: R-Help List > Subject: [R] use of "@" character in variable name > > Importing data with a header row using read.delim, one variable should be > named @5HTT but it is automatically renamed to X.5HTT, presumably because > the "@" is either unacceptable or misunderstood. I've tried to find out > what the rules are on variable names but have been unsuccessful. I'll bet > someone here can tell me where to look. Maybe it's hidden away in here > somewhere: > > http://cran.r-project.org/doc/manuals/R-data.pdf > > Thanks in advance. > > Mike > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
