Re: [Rd] Locating code that is outside of functions in R scripts

From: Gabor Grothendieck <ggrothendieck_at_gmail.com>
Date: Wed, 23 Dec 2009 19:51:30 -0500

This sources the indicated file into the local environment (i.e. the environment within src) and then only copies out the objects that are functions into the workspace so that you are only left with them.

src <- function(file) {

   source(file, local = TRUE)
   for(nm in ls(all = TRUE)) if (is.function(get(nm))) assign(nm, get(nm), .GlobalEnv)
}

# usage:
src("myfile.R")

On Wed, Dec 23, 2009 at 7:04 PM, <gheine_at_mathnmaps.com> wrote:
>
> Working with a number of scripts (text files with R commands) that I
>
> "source" into R sessions from time to time.
>
> The source() command is most convenient (at least for me)
>
> if it only loads function definitions, and doesn't otherwise change the
>
> interactive environment.  For example, I might have a file that looks like
>
>
>
> func1<-function() {
>
>  code
>
>  code
>
>  code
>
>  }
>
> # this is a comment
>
>
>
> A<-"this is code outside the function definitions";
>
>
>
> func2<-function() {
>
>   code
>
> # a comment with a spurious }
>
>   code
>
>   code
>
>   }
>
>
>
> I would like a quick-and-dirty script that finds the line beginnning with
>
> "A", since it is R code outside of any function definition.
>
> On the other hand it would ignore the two comment lines, and would not be
>
> fooled by the spurious "}" in the second comment line.
>
> Probably not too hard to put something like this together, but am making
>
> this post in case it is something that has already been done.
>
>
>
>
>
> Thanks!
>
> ______________________________________________
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>



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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Thu 24 Dec 2009 - 00:57:19 GMT

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