adehabitat (version 1.8.20)

image.asc: Displays a Color Image of a Matrix of Class 'asc'

Description

These functions display a raster matrix of class asc.

Usage

# S3 method for asc
image(x, col = gray((240:1)/256), clfac = NULL, …)
# S3 method for asc
contour(x, …)
# S3 method for asc
persp(x, …)
# S3 method for asc
plot(x, …)

Arguments

x

a matrix of class asc

col

for maps of type "numeric", the colors to be used (see help(par))

clfac

for maps of type "factor", a character vector giving the names of colors for each level of the factor (see help(colasc))

…

additional arguments to be passed to the generic function image, persp, contour, and filled.contour (but see below)

See Also

image, contour, persp, filled.contour, asc

Examples

# NOT RUN {
data(puechabon)

# Case of a continuous variable: the elevation
my.map <- getkasc(puechabon$kasc, "Elevation")
image(my.map, main = "Elevation in Puechabon")
contour(my.map, add = TRUE)

# use of the function plot.asc: adding points on the map
plot(my.map, plot.axes = {points(puechabon$locs[,c("X","Y")])},
     main = "Elevation")

# Case of a factor: the aspect
asp <- getkasc(puechabon$kasc, "Aspect")
cl <- colasc(asp, NorthEast = "blue", SouthEast = "red", 
             SouthWest = "orange", NorthWest = "green")

## graphical display
image(asp, clfac = cl, main = "Aspect", xlab = "Lambert X",
      ylab = "Lambert Y") 
legend(706500, 3162000, legend = levels(asp), fill = cl,
       cex = 0.7)


opar<-par(mar = c(0,0,3,0), bg = "slategray")
persp(my.map, scale = FALSE, box = FALSE, border = NA, shade = 0.75, 
      col = "darkolivegreen3", expand = 2, theta = -60, phi = 30, 
      main = "The topography of Puechabon")
par(opar)


# }