"Lucke, Joseph F" <[EMAIL PROTECTED]> writes: > > The TRUE/FALSE vs. T/F issue brings up a related one. Can one assign a > variable a value during an R session that cannot be re-assigned any new > value during the session? That is, the variable is `protected' from > change during the session. `Session' here is not precisely defined, so
Environments and their bindings can be locked. > env <- new.env(parent=emptyenv()) > env[["x"]] <- 10 > lockBinding(env=env, sym="x") > env[["x"]] <- 11 Error in env[["x"]] <- 11 : cannot change value of locked binding for 'x' Martin > that will induce some problems. A reference to this problem would be > sufficient. > > ______________________________________________ > 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. -- Martin Morgan Computational Biology / Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109 Location: Arnold Building M2 B169 Phone: (206) 667-2793 ______________________________________________ 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.
