fields (version 6.7.5)

plot.surface: Plots a surface

Description

Plots a surface object in several different ways to give 3-d information e.g. a contour plots, perspective plots.

Usage

## S3 method for class 'surface':
plot(x, main = NULL, type = "C", zlab = NULL, xlab = NULL,
    ylab = NULL, levels = NULL, zlim = NULL, graphics.reset = NULL,
     labcex = 0.6, add.legend=TRUE, ...)

See Also

surface, predict.surface, as.surface, drape.plot, image.plot

Examples

x<- seq( -2,2,,80)
y<- seq( -2,2,,80)
# a lazy way to create some test image
z<- outer( x,y, "+")

# create basic image/surface object
obj<- list(x=x, y=y,z=z)

# basic contour plot
# note how graphical parameters appropriate to contour are passed
plot.surface( obj, type="c", col="red")

# using a fields function to fit a surface and evaluate as surface object.
fit<- Tps( BD[,1:4], BD$lnya) # fit surface to data 
# surface of variables 2 and 3 holding 1 and 4 fixed at their median levels
 out.p<-predict.surface(fit, xy=c(2,3))  

 plot.surface(out.p) # surface plot