I believe that what is happening is that you never run fun1, so no environment for fun1 is ever created and therefore x1 is never defined with its own environment. You grab the statement y <- x1 from the body of fun1, but then tries to evaluate it in the current environment (where it cannot find x1).
The reason you cannot find the executing environment for fun1 is because it is never created. Maybe if you tell us more about what you are trying to accomplish we can give better suggestions for how to approach it. On Wed, May 28, 2014 at 6:29 PM, Spencer Graves <spencer.gra...@structuremonitoring.com> wrote: > Hello: > > > I'm writing code to modify a function, and I want to know how to > access the executing environment of the function. The example below > extracts the body of a function and executes a single line but can't find > "x1" in the function's executing environment. How would you suggest fixing > this? Thanks, Spencer > > > fun1 <- function(x1=1){ > y <- x1 > } > fun2 <- function(fun=fun1){ > bo <- body(fun) > bo2 <- bo[[2]] > z <- eval(bo2) > } > tst <- fun2() > > Error in eval(expr, envir, enclos) : object 'x1' not found >> >> > > ______________________________________________ > 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. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ 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.