On 15/05/2008 7:07 AM, Tobias Verbeke wrote:
Dear list,I did not find any mentioning of the fact that the ** operator can be used as a synonym for the ^ operator. > 5 ** 2 [1] 25 Searching of ** in the R Reference Index only leads to some examples in the mgcv documentation. Equally ?"**" does not open the arithmetic operators help page, but produces > ?"**" No documentation for '**' in specified packages and libraries: you could try 'help.search("**")' Is there any reason to this or am I overlooking something ?
It's fairly unlikely to go away, but it's an old undocumented feature, so use at your own risk. There are lots of other undocumented features, but maybe no others at the lexical level. Check out src/main/gram.y if you want to search for more at that level, and src/* if you want them at any level.
Duncan Murdoch
Many thanks in advance, Tobias > sessionInfo() R version 2.7.0 (2008-04-22) i486-pc-linux-gnu locale: LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
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