[R] How do I import packages with the package I've built?

[Uwe Ligges]

There is a difference between importing a namespace and loading a package:

If you import functions from a namespace into your package, these 
functions are known within that namespace, i.e. functions from your 
package's namespace know the other functions and can use them. The user 
still won't see those imported functions while working on the top level.
If you want the latter, you have to load the other package explicitly, 
e.g. in your .onLoad directives.

Uwe Ligges


Nutter, Benjamin wrote:
> I have successfully completed building a package to contain the
> functions I commonly use.  However, I need to have other packages
> installed in order for some of my functions to work.  I've been studying
> the instructions on installing packages for about a month now, but still
> haven't figured this one out.  From what I do understand, to import
> additional packages I need some combination of commands in my
> DESCRIPTION and NAMESPACE files.  Currently, these are what mine look
> like:
> 
> DESCRIPTION
> Package: myPackage
> Type: Package
> Title: Commonly used functions.
> Version: 1.0
> Date: 2007-11-08
> Author: My Name
> Maintainer: My Name <myfault at somewhere.net>
> Description: Blah Blah Blah
> License: R 2.3.0
> Depends: MASS, survival
> 
> 
> NAMESPACE
> export(func1, func2, ... , funcx)
> 
> import(MASS, survival)
> 
> 
> These pass all the checks, and the package installs just fine, but it
> doesn't load MASS and survival when I load myPackage.  What am I doing
> wrong?
> 
> Benjamin
> 
> 
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