### Name: plot.surface
### Title: Contour plot of the estimated expected utility surface.
### Aliases: plot.surface
### Keywords: contour

### ** Examples

dir <- 'C:/R/R-2.2.1/library/forwsim/data'                              #read forward simulation output
sim1 <- read.forwsim(dir)

plot.surface(sim1$bgrid,sim1$u,sim1$b0[5],main='')                      #obtain contour plot for 5th b0 value




