I wish to have inward-pointing ticks on my contourplot graph, but the 
colored background produced by the "region=TRUE" statement covers the 
ticks up, is there any way around this? Sample code below.  --Seth

library(lattice)

model <- function(a,b,c,d,e, f, X1,X2)          # provide model function 
for contour plot
 {J <- a + (b*X1) + (c*X2) + (d*X1*X2) + e*(X1^2) + f*(X2^2)
  pp <- exp(J)/(1+exp(J))
  return(pp)}

g <- expand.grid(X1= seq(0.3,0.9,0.001), X2 = seq(0.3,1, 0.001))
g$z <- model(-29, -14, 52, 80, -3, -56, g$X1, g$X2)             # Create 
variable z using gridded data, model, and variables

contourplot(z ~ X1 * X2, 
 data = g,
 region = TRUE,         # Adds color to background
 cuts = 10,                     # Number of contour intervals...(and color 
intervals!)
 scales = list(tck = c(-1,-1))  # ticks go inward 
 )   ### END


	[[alternative HTML version deleted]]

