Peter Dalgaard BSA writes: > It is not only non-trivial, but there is also a risk of running into > logical inconsistencies in some applications of model formulas. E.g. > in nls() and friends, the RHS is an arbitrary R expression and it > might involve true character strings -- think > > y~lsoda(start, "Time since inj.", "myfun", parms=c(a=1,b=2), > dllname="myfun.dll") > > where "Time since inj." could be a variable name, but the other two > are literals.
Maybe I() could be used to escape the true character strings? Tom ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
