[R] Sourcing commands but delaying their execution

[Mark Wardle]

While I don't use such a workflow, one option would be to place the
series of commands in a function, and then run that as appropriate.

do.initialisation <- function() {
  ...
}


do.cleanup <- function() {
}



Best wishes,

Mark

On 03/08/07, Dennis Fisher <fisher at plessthan.com> wrote:
> Colleagues:
>
> I have encountered the following situation:
>         SERIES OF COMMANDS
>         source("File1")
>         MORE COMMANDS
>         source("File2")
>
> Optimally, I would like File1 and File2 to be merged into a single
> file (FileMerged).  However, if I wrote the following:
>         SERIES OF COMMANDS
>         source("FileMerged")
>         MORE COMMANDS
>
> I encounter an error: the File2 portion of FileMerged contains
> commands that cannot be executed properly until "MORE COMMANDS" are
> executed.  Similarly, sourcing FileMerged after MORE COMMANDS does
> not work because MORE COMMANDS requires the information from the
> File1 portion of FileMerged.
>
> I am looking for a means to source FileMerged but not execute some of
> the commands immediately.  Functionally this would look like:
>         SERIES OF COMMANDS
>         source("FileMerged")    # but withhold execution of some of the commands
>         MORE COMMANDS
>         COMMAND TO EXECUTE THE WITHHELD COMMANDS
>
> Does R offer some option to accomplish this?
>
> Dennis
>
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone: 1-866-PLessThan (1-866-753-7784)
> Fax: 1-415-564-2220
> www.PLessThan.com
>
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-- 
Dr. Mark Wardle
Clinical research fellow and specialist registrar, Neurology
Cardiff, UK