Re: [Rd] Dependency problem for "hasArg"

From: Dirk Eddelbuettel <edd_at_debian.org>
Date: Mon, 02 Jul 2012 12:00:41 -0500

On 2 July 2012 at 09:23, Charlie Friedemann wrote:
| The error message you are getting makes it rather clear what the problem is.
| R is unable to find the function 'hasArg'. As the hasArg function is part
| of the package 'methods', a solution would be to put require(methods) at the
| beginning of your script.
|
| For whatever reason, loading R via Rscript does not load the base package
| "methods" whereas loading the R console does. I'm not entirely sure why this
| is the case, and I'm sure someone who knows more about the differences
| between the two could chime in here.

That was a design decision in Rscript as loading 'methods' is slow. And FWIW, littler does the same:

  edd_at_max:~$ r -e'print(search())'
  [1] ".GlobalEnv" "Autoloads" "package:base"   edd_at_max:~$ r -lmethods -e'print(search())'   [1] ".GlobalEnv" "package:methods" "Autoloads" "package:base"   edd_at_max:~$

Dirk

-- 
Dirk Eddelbuettel | edd@debian.org | http://dirk.eddelbuettel.com

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