[R] checkUsage from codetools shows errors when function uses functions from loaded packages

[Duncan Murdoch]

On 08/04/2013 2:12 PM, Jannis wrote:
> Dear list members,
>
>
> I frequently program small scripts and wrap them into functions to be
> able to check them with checkUsage. In case these functions (loaded via
> source or copy pasted to the R console) use functions from other
> packages, I get this error:
>
>
> no visible global function definition for ‘xxxxxxx’
>
> For example:
>
>
>
> test = function() {
>     require(plotrix)
>     color.legend()
> }
>
> library(codetools)
> checkUsage(test)
>
>
> Can I tell codetools somehow where to look for these functions without
> building a full blown package?

Sure, just attach the other package.  For example:

 > f <- function() plot3d(1,1,1)
 > library(codetools)
 > checkUsage(f)
<anonymous>: no visible global function definition for ‘plot3d’
 > library(rgl)
 > checkUsage(f)
 >

Duncan Murdoch