R help - Dec 2003 - grid packages since R-1.7.1

I'm having a spot of bother using code that worked with R-1.7.1 but
will not work with 1.8.1.

The beginning of the saga is with grid.polygon ostensibly not
findable.  One does exist in ..../R-1.8.1/library/grid/R, and when I
specifically load the grid package (which probably isn't a good idea),
it starts finding fault with the length of vectors being unequal.

I suspect the lengths of the vectors has more to do with a scoping
error.  If I understood why grid.polygon wasn't being found, and what
I should do about it instead of what I did, I suspect the length of
vectors problem would vanish.  It works as I'd expect in 1.7.1.

I've been using this same .Rprofile for all versions:

options(defaultPackages =  c("mva", "lattice"),
keep.source.pkgs = TRUE)

It's rather unlikely that I should specifically load grid also, but
perhaps some other tricky dependency is happening.

I probably could do the rest of the project with 1.7.1, but I'd like
to be tidier than that.

Ideas appreciated.

Thanks


-- 
Patrick Connolly
HortResearch
Mt Albert
Auckland
New Zealand 
Ph: +64-9 815 4200 x 7188
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On Thursday 04 December 2003 21:19, Patrick Connolly
wrote:
> I'm having a spot of bother using code that worked with R-1.7.1 but
> will not work with 1.8.1.
>
> The beginning of the saga is with grid.polygon ostensibly not
> findable.  One does exist in ..../R-1.8.1/library/grid/R, and when I
> specifically load the grid package (which probably isn't a good idea),
> it starts finding fault with the length of vectors being unequal.
>
> I suspect the lengths of the vectors has more to do with a scoping
> error.  If I understood why grid.polygon wasn't being found, and what
> I should do about it instead of what I did, I suspect the length of
> vectors problem would vanish.  It works as I'd expect in 1.7.1.
>
> I've been using this same .Rprofile for all versions:
>
> options(defaultPackages =  c("mva", "lattice"),
keep.source.pkgs = TRUE)
>
> It's rather unlikely that I should specifically load grid also, but
That's exactly what you need to do (i.e., load grid explicitly). This has to
do with namespaces, which makes some earlier notions obsolete. lattice 
'imports' grid function definitions but by itself no longer makes them 
available/visible to the user.

This of course doesn't explain any problems in grid.polygon after loading 
grid. grid.polygon has changed in 1.8.1, but I think it is supposed to be 
back-compatible. Could you provide a reproducible example ? 

Deepayan