I have been searching around for some time, but with no luck for this particular problem.
-- *Pivotal <http://www.gopivotal.com/>* A new platform for a new era On Sat, Feb 1, 2014 at 9:02 AM, Ista Zahn <istaz...@gmail.com> wrote: > This has been discussed extensively, on this list as well as > elsewhere. I suggest doing a web search, read up on the issue, and > post back here only if you have specific questions that are not > answered already. > > Best, > Ista > > On Sat, Feb 1, 2014 at 11:40 AM, Hai Qian <hq...@gopivotal.com> wrote: > > I know using eval is not optimal and maybe bad, but how to avoid using > eval > > in the following example > > > > func1 <- function(dat, eval.this) { > > eval(parse(text = paste0("with(dat, ", eval.this, ")"))) > > } > > > > dat <- data.frame(x = 1:2, y = 2:3) > > > > func1(dat, "x*2+y") > > > > func1(dat, "sin(x)*cos(y)") > > > > Here eval.this is a string that contains whatever the user wants to > > evaluate. I wonder whether there is a neat way to avoid using eval in > this > > case? So far I have not figured out a way to do this. > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
