| Library: | graphic |
| See also: | grlinreg2 grsurface grcontour3 contour2 |
| Quantlet: | grcontour2 | |
| Description: | Generates a contour plot from a three-dimensional data set x |
| Usage: | gs = grcontour2 (x, c, {, col}) | |
| Input: | ||
| x | n x 3 matrix, three-dimensional data. | |
| c | m x 1 vector, indicates the levels at which the function is cut. | |
| col | optional m x 1 vector, colors of the contour plot. | |
| Output: | ||
| gs | composed graphical object | |
library("graphic")
x = grid(#(-3,-2.5), #(0.2,0.2), #(30,30))
f = cos(x[,1])+sin(x[,2])^2
c =(1:9).*max(f)./12
gs = grcontour2(x~f, c)
d = createdisplay(1,1)
show(d, 1, 1, gs)
Shows a contour plot of a sinus-cosinus function at 9 different cut levels.
library("graphic")
library("smoother")
x = read("geyser")
fh = denestp(x) ; estimate density
c =(1:9).*max(fh[,3])./12
gs = grcontour2(fh, c)
d = createdisplay(1,1)
show(d, 1, 1, gs)
Shows a contour plot of the estimated density of the geyser data set at 9 different levels.