plot.surface {fields}R Documentation

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, ...)

Arguments

x

A surface object. At the minimum a list with components x,y and z in the same form as the input list for the standard contour, persp or image functions. This can also be an object from predictSurface.

main

Title for plot.

type

type="p" for a perspective/drape plot (see drape.plot), type="I" for an image plot with a legend strip (see image.plot), type="c" draws a contour plot, type="C" is the "I" option but with contours lines added. type="b" gives both "p" and "C" as a 2X1 panel

zlab

z-axes label

xlab

x-axes label

ylab

y-axes labels

levels

Vector of levels to be passed to contour function.

graphics.reset

Reset to original graphics parameters after function plotting. Default is to reset if type ="b" but not for the single plot options.

zlim

Sets z limits on perspective plot.

labcex

Label sizes for axis labeling etc.

add.legend

If TRUE adds a legend to the draped perspective plot

...

Other graphical parameters that are passed along to either drape.persp or image.plot

See Also

surface, predictSurface, 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<-predictSurface(fit, xy=c(2,3))  

 plot.surface(out.p) # surface plot  


[Package fields version 8.4-1 Index]