Camel case will cause database issues, too, at least if you ever need to move from one db to another--every one seems to have its own idea whether to preserve case, up-case, or down-case object names. You may not care if you only use one db and only from R.
SomeOfUsFindCamelCaseUnreadableToo. --Todd -- Why is a Guinea pig neither a pig nor from Guinea? > -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Krzysztof > Sakrejda-Leavitt > Sent: Thursday, March 26, 2009 6:32 PM > To: Mike Miller > Cc: R-Help List > Subject: Re: [R] use of "@" character in variable name > > The '@' character is an operator used for accessing slots in > S4 classes. > Similarly the '$' character is the operator for accessing > elements of > lists, etc... > > Although R allows periods, SQL databases will choke on them. > LaTeX will > (sometimes?) choke on underscores, and of course any native R > operator > will cause problems. My take is that camelBackCapitalization is the > best practice in naming columns, list elements, variables, > and functions > for R. > > Best, > > Krzysztof. > > 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 > > > > 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. > > > > -- > > ----------------------------------------------- > Krzysztof Sakrejda-Leavitt > > Organismic and Evolutionary Biology > University of Massachusetts, Amherst > 319 Morrill Science Center South > 611 N. Pleasant Street > Amherst, MA 01003 > > work #: 413-325-6555 > email: sakre...@nsm.umass.edu > > ______________________________________________ > 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.
