I think you want some eval/substitute action, such as
fc <- function(m) { eval(substitute(curve(m))) }-roger
Barry Rowlingson wrote:
I'm trying to write some code that throws a few expressions around the place, and I've boiled down the problem to be equivalent to this.
Consider the curve function which plots expressions in 'x':
> curve(x^2)
Now wrap that in the most naive wrapper function:
> fc=function(m){curve(m)}
and try it:
> fc(x^2) Error in eval(expr, envir, enclos) : Object "x" not found
What could be done to my 'fc' or the expression processing of curve to make this sort of thing work?
What I also want to do is provide a default, something like:
fc = function(m=sqrt(x)){curve(m)}
It's not actually curve() that I want to call, but something similar I've written myself, so I can fiddle with that as I wish.
I've had a read of the R Language Definition - I imagine the answer is in there somewhere...
Barry
______________________________________________
[EMAIL PROTECTED] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
