Hi all.
I'm for the first time trying to make a library in R 2.8.1 on Ubuntu Linux. The library is very simple, R functions just need to share a variable (that is defined in the R code) and maybe functions and export functions for the user to .GlobalEnv. This variable should only be directly accessible from the global workspace (without change of environment) via a hereto dedicated function. It only consists of R code. I'm not sure if I should rather ask R-help. If so, just tell me. The package source is available at http://www.delff.dk/~philip/bdplot/ the check output at http://www.delff.dk/~philip/bdplot.Rcheck/ The package code was checked and stopped because of lack of examples. Until that, everything is OK. > ### ** Examples > > ~~ simple examples of the most important functions ~~ Error: unexpected symbol in "~~ simple examples" Execution halted I would like to get the code issue solved before moving the documentation from the R scripts and have proceeded the to building and installation. These two last steps gave no warnings or errors. My problem is that I cannot change the mentioned variable (from now on called .FOO) that belongs to the namespace of the package. I think it is because .FOO variable in some locked state, maybe by default created as read-only. It is called .FOO because I use exportPattern("^[[:alpha:]]+") as NAMESPACE file. I don't import anything. I have a function (bar) that, like par does with .Pars from the graphics namespace, modifies the contents of a list. This function has in the bottom (when the function name is called without () from the R command line) a line <environment: namespace:"mypackage"> This is like par() has the graphics namespace mentioned, and therefore, as I would expect. I can via this function read the contents of the variable just by print(.FOO). This cannot be done from .GlobalEnv which is as intended. The surprise is that I cannot write to it. If I do .FOO$x <<- "value" (names and values are arguments to the function, like with par().), I get the error: cannot change value of locked binding for '.FOO' The double arrow, I use because <- does not affect the contents of .FOO after the function has run. I don't know how I can use assign in this case. I don't know a name for my package's environment. I have tried with my package's name in both assign() and unlockBinding(), but my package's name is not recognized as an environment (neither beginning with a dot.). I also tryed unlockBinding() in the NAMESPACE file. I don't know if this is normal, but I get <environment: R_GlobalEnv> from print(parent.frame()) and things like <environment: 0x8df2ad0> from print(environment()) This is surprising to me. I would expect <environment: bdplot> from environment(). How can I get to write to .FOO via bar()? Thank you very much Philip. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
