[Rd] Links in Doc to plots for 3d (PR#13939)

[ivo_welch at brown.edu]

Full_Name: ivo welch
Version: 2.9.2
OS: OSX
Submission from: (NULL) (128.148.61.243)



could you please add in the "See also" section of "plot" a link to "persp for 3d
plots", and in the "persp" See also section links to

cloud() in package "lattice"
plot3d() in package "rgl"
scatterplot3d() in package "scatterplot3d"

I was stymied for a long time about what I should use where.

regards,

/iaw