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

[Nutter, Benjamin]

So if I understand you correctly, if I include in my namespace file the
command    importFrom(MASS, stepAIC),   whenever stepAIC is called from
my package, it will still run even if I haven't explicitly imported the
MASS package?

Or if I use the command      import(survival)   then the functions in
the survival package will work within my functions even without
explicitly loading the package?

Thanks for the help.

Benjamin

-----Original Message-----
From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de] 
Sent: Saturday, November 17, 2007 12:04 PM
To: Nutter, Benjamin
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] How do I import packages with the package I've built?

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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===================================

P Please consider the environment before printing this e-mail

Cleveland Clinic is ranked one of the top hospitals
in America by U.S. News & World Report (2007).  
Visit us online at http://www.clevelandclinic.org for
a complete listing of our services, staff and
locations.


Confidentiality Note:  This message is intended for use\...{{dropped:13}}