All the points are connected as a surface (like connecting points by lines
in two dimensions). In contrast, withcloud(), the points are isolated.
Forwireframe(), the (x,y) pairs must form a rectangular grid, though not
necessarily be evenly spaced.
The three-dimensional plotting functions have many different options.
For instance, a nice one forwireframe()isshade=T, which makes the data eas-
ier to see. Many functions, some with elaborate options, and whole new
graphics packages work at a higher (read “more convenient and powerful”)
level of abstraction than R’s base graphics package. For more information,
refer to the books cited in footnote 1 at the beginning of this chapter.
Graphics 283