[R] [Rd] How to link to vignette from .Rd file

[Duncan Murdoch]

On 11/9/2006 1:15 PM, Agner Fog wrote:
> Duncan Murdoch wrote:
> 
>> Actually how you built the .pdf is irrelevant, but it does look for 
>> file with the same name and one of these extensions:
>>
>>  "Rnw"  "rnw"  "Snw"  "snw"  "Rtex" "rtex" "Stex" "stex"
>>
>> So you could just create a zero length file with the same basename and 
>> one of those extensions, and it should work.
>>
>> I don't know if this restriction is intentional.
> 
> I wouldn't rely on this hack working in future versions. What if it 
> creates an empty pdf file from the zero-length Rnw file or deletes the 
> pdf file for the reason that the Rnw file is invalid. It is better to 
> make the system recognize pdf files than to rely on dirty undocumented 
> hacks, IMHO.

Actually this is documented to work.  R doesn't assume it can build a 
vignette, so if you supply a .pdf in your source package, it will use 
that rather than trying to build one.