... Of course if arg1 and arg2 are expressions (as characters strings) that themselves contain commas, then this won't work. So the poster does, indeed, seem to have achieved near obfuscation optimality.
Of course this is yet another case where Lumley's principle (at least I think it's his) holds: if you have to use eval(parse(...)) rethink -- there's a better way. Bert Gunter Genentech Nonclinical Statistics -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tim Calkins Sent: Monday, October 29, 2007 3:16 PM To: Gang Chen Cc: [EMAIL PROTECTED] Subject: Re: [R] Converting a string Hi - you can split the string using strsplit(). if your function uses Argument1 as a string, then you're all set. If that's not the case then you can get() the object. >myfunc <- function(arg1, arg2) { + arg1 <- get(arg1) + arg2 <- get(arg2) ... } >args <- "argument1,argument2" # easier with no " " after the "," >myfunc(strsplit(args)[[1]][1],strsplit(args)[[1]][2]) This seems needlessly complicated: if obfuscation is your goal, you're well on your way to success. Of course, that may be a feature of my solution -- obfuscation is often MY goal. HTH. tim On 10/30/07, Gang Chen <[EMAIL PROTECTED]> wrote: > Thanks for the help. > > One case is like this: With function MyFunc(Argument1, > Argument2, ...) I have the first two arguments defined as one > variable "tempstr", a string of characters, like > > tempstr <- "Argument1, Argument2" > > The question is how I can feed tempstr into MyFunc to make it > executable? > > Gang > > On Oct 29, 2007, at 5:42 PM, jim holtman wrote: > > > Can you provide an example of your input and what you expect the > > output to be. You can always use 'as.numeric'. > > > > On 10/29/07, Gang Chen <[EMAIL PROTECTED]> wrote: > >> This must be very simple, but I'm stuck. I have a command line in R > >> defined as a variable of a string of characters. How can I convert > >> the variable so that I can execute it in R? > >> > >> Really appreciate any help, > >> Gang > > ______________________________________________ > 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. > -- Tim Calkins 0406 753 997 ______________________________________________ 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.
