[R] use of "@" character in variable name

Thomas Lumley tlumley at u.washington.edu
Fri Mar 27 08:40:24 CET 2009

On Thu, 26 Mar 2009, Mike Miller wrote:

> 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

It's hidden away in: FAQ 7.14 What are valid names?


Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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