[R] R CMD CHECK and require() / library() methods

[Crispin Miller]

Many thanks! 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Prof 
> Brian Ripley
> Sent: 25 April 2007 16:03
> To: Crispin Miller
> Cc: R-help at stat.math.ethz.ch
> Subject: Re: [R] R CMD CHECK and require() / library() methods
> 
> On Wed, 25 Apr 2007, Crispin Miller wrote:
> 
> > Hi,
> >
> > I have a piece of code that decides at runtime whether to 
> load a data 
> > package (and which package to load).
> > This is then done with a call to:
> >
> > library(x)
> >
> > (where x is a character variable containing the package name).
> >
> > This causes R CMD check to throw out a warning:
> > 'library' or 'required' calls not declared from:
> > x
> 
> Which version of R is this?  All I can find say 'require'.
> 

My mistake - it was a typo it says: 'require'

> >
> > Does anyone have any suggestions as to a fix or workaround for this?
> 
> That call should be
> 
> library(x, character.only=TRUE)
> 
> and that will in R 2.5.0 stop the warning AFAIK.
> 

It works - much appreciated...

Crispin
 
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