I think rapply() was changed to act like lapply() in this respect. In R-3.1.3 we got rapply(list(quote(1+myNumber)), evalq, envir=list2env(list(myNumber=17))) #[1] 18 rapply(list(quote(1+myNumber)), eval, envir=list2env(list(myNumber=17))) #Error in (function (expr, envir = parent.frame(), enclos = if (is.list(envir) || : object 'myNumber' not found lapply(list(quote(1+myNumber)), evalq, envir=list2env(list(myNumber=17))) #Error in eval(substitute(expr), envir, enclos) : object 'X' not found lapply(list(quote(1+myNumber)), eval, envir=list2env(list(myNumber=17))) #[[1]] #[1] 18 while in R-3.2.0 we get rapply(list(quote(1+myNumber)), evalq, envir=list2env(list(myNumber=17))) #Error in eval(substitute(expr), envir, enclos) : object 'X' not found rapply(list(quote(1+myNumber)), eval, envir=list2env(list(myNumber=17))) #[1] 18 lapply(list(quote(1+myNumber)), evalq, envir=list2env(list(myNumber=17))) #Error in eval(substitute(expr), envir, enclos) : object 'X' not found lapply(list(quote(1+myNumber)), eval, envir=list2env(list(myNumber=17))) #[[1]] #[1] 18
Make the FUN argument function(arg)sys.call() to see some details of the change. Bill Dunlap TIBCO Software wdunlap tibco.com On Wed, Jul 15, 2015 at 12:35 PM, Dayne Filer <dayne.fi...@gmail.com> wrote: > In 3.1.2 eval does not store the result of the bquote-generated call in > the given environment. Interestingly, in 3.2.1 eval does store the result > of the bquote-generated call in the given environment. > > In other words if I run the given example with eval rather than evalq, on > 3.1.2 "x" is never stored in "fenv," but it is when I run the same code on > 3.2.1. However, the given example stores "x" in "fenv" on 3.1.2, but throws > the error I gave when run on 3.2.1. > > To give credit, I received the idea for using evalq from SO: > http://stackoverflow.com/a/22559385 > > Dayne > > > On Wed, Jul 15, 2015 at 3:29 PM, William Dunlap <wdun...@tibco.com> wrote: > >> I am curious why you used evalq instead of eval in this code. >> >> Bill Dunlap >> TIBCO Software >> wdunlap tibco.com >> >> On Wed, Jul 15, 2015 at 11:49 AM, Dayne Filer <dayne.fi...@gmail.com> >> wrote: >> >>> Hello, >>> >>> I upgraded from 3.1.2 to 3.2.1 and am receiving errors on code that >>> worked >>> as I intended previously. Briefly, I am using bquote to generate >>> expressions to modify data.table objects within a function, so I need >>> the >>> changes to actually be stored in the given environment. Previously, I >>> used >>> code like the following: >>> >>> test <- list(bquote(x <- 10)) >>> fenv <- environment() >>> rapply(test, evalq, envir = fenv) >>> >>> Although the code in the example above is much simpler, it shows the >>> problem. On 3.1.2 the expression is evaluated and x is stored as 10 in >>> the >>> given environment, fenv. In 3.2.1 the code throws an error: >>> >>> Error in eval(substitute(expr), envir, enclos) : object 'X' not found >>> >>> I could not find anything in the release notes that would explain this >>> change. Changing evalq to eval works in 3.2.1, but eval does not store x >>> in >>> the given environment in 3.1.2. >>> >>> Thanks, >>> >>> Dayne >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-devel@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-devel >>> >> >> > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
