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

Jannis
Mon, 08 Apr 2013 18:29:56 -0000

Thanks for your reply, Duncan. I hoped for an auutomatic way without
manually having to load the packages to exist ... Perhaps this time this
is not the case.

Cheers
Jannis

On 08.04.2013 20:25, Duncan Murdoch wrote:
> 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