The following gives a list, 'z', of functions with different values of the variable 'i': > z <- lapply(1:3, function(i) { force(i) ; function() cat("i is", i, "\n")}) > z[[3]]() i is 3 > z[[2]]() i is 2 Their printed values don't show the difference, as they depend on the 'i' stored in their environments: > z [[1]] function () cat("i is", i, "\n") <environment: 0x0422c574>
[[2]] function () cat("i is", i, "\n") <environment: 0x0422b97c> [[3]] function () cat("i is", i, "\n") <environment: 0x0422bb04> You can look at their environments with > lapply(z, function(zi)ls.str(environment(zi))) [[1]] i : int 1 [[2]] i : int 2 [[3]] i : int 3 These environments will survive a save/load cycle but will silently disappear in a dump/source cycle. Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Rolf Turner > Sent: Saturday, January 07, 2012 2:07 PM > To: Carl Witthoft > Cc: r-help@r-project.org > Subject: Re: [R] Putting an index explicitly into function code --- a > curiosity. > > On 08/01/12 05:24, Carl Witthoft wrote: > > Now that we've all satisfied our curiosity :-) about force() in for > > and while loops, I suppose it would be impolite to ask Rolf whether > > there isn't a much neater and simpler way to make his internal > > functions grab whatever the index 'i' is pointing them to? > > No. There isn't. I need what I said I needed: a list of functions, > the i-th function in the list explicitly involving the index "i". > > cheers, > > Rolf Turner > > ______________________________________________ > 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. ______________________________________________ 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.