[R] Wireframe graph: black and white shading instead of color

[David Afshartous]

All,

The code below produces a color 3D graph.  I'd like to make it black and
white shading.  I tried setting col.regions to FALSE but this just made it
completely white.  I want the graph to look exactly as is, except black (or
grey) and white shading.  Is this possible?

Cheers,
David


p.list = c(.01, .1, .25, .5, .75, .9)
cov.list = c(.2, .1, .05)  ### leave out .01



X = rep(p.list, 3) 
Y = rep(cov.list, 1, each=6)
Z = c(2475.000000,   225.000000,    75.000000,    25.000000,     8.333333,
2.777778,  9900.000000, 900.000000,   300.000000,   100.000000,
33.333333,    11.111111, 39600.000000,  3600.000000,
1200.000000,   400.000000,   133.333333,    44.44444)


lattice.options(default.theme = "col.whitebg")



wireframe(Z ~ X * Y, scales = list(arrows = FALSE),

               bg = "white", drape = TRUE, shade = FALSE, colorkey = FALSE,
xlab = "p", ylab = "C.O.V.", zlab ="n")