R devel - Mar 2011 - Run script automatically when package is loaded

Dear list,

is it possible to specify a script that is executed "automatically"
when my
package is mounted via 'require(my.pkg)' or 'library(my.pkg)'?

Id' like to specify execute a small init function that creates some crucial
environment structures. As it's always the first thing to do when using the
package, I wanted to "hide" it from the user so he won't have to
think about
this step.

Can I use the lazy-loading functionality of packages for that (Writing R
Extensions, Section 1.1.5 Data in packages, pp. 10)?

Thanks for any suggestions,
Janko

On 12 March 2011 at 14:06, Janko Thyson wrote:
| Dear list,
| 
| is it possible to specify a script that is executed "automatically"
when my
| package is mounted via 'require(my.pkg)' or 'library(my.pkg)'?

That has been possible all along. See help(".onLoad") if you use a
NAMESPACE
(as you should) or help(".First.lib") if you don't.

Dirk
 
| Id' like to specify execute a small init function that creates some
crucial
| environment structures. As it's always the first thing to do when using
the
| package, I wanted to "hide" it from the user so he won't have to
think about
| this step.
| 
| Can I use the lazy-loading functionality of packages for that (Writing R
| Extensions, Section 1.1.5 Data in packages, pp. 10)?
| 
| Thanks for any suggestions,
| Janko
| 
| ______________________________________________
| R-devel at r-project.org mailing list
| https://stat.ethz.ch/mailman/listinfo/r-devel

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