On 17/03/2009 6:44 AM, Josh wrote:
Hi,
I guess I have a naive question. I use kde2d function in a standard way to
estimate kernel densities of x and y (x and y are vectors) and plot them
using image().
f1=kde2d(x,y)
image(f1)
But what if I want to see kernel estimates of three variables, x, y and z (a
vector) plotted together ? Something in which x<->y is plotted and colored
according to the corresponding value of z ?
See the kde3d example in the misc3d package for contour plots of a 3d
density function (not as you described, but very nicely done).
Or if you just want 3d plots of a 2d function, you can use persp (from
graphics) or persp3d (from rgl).
Duncan Murdoch
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