On 23/02/2010 6:01 AM, Preeti Iyer wrote:
Hello,
I have a set of points (x and y coordinates) generated by
multidimensional scaling function (isoMDS) . The z-axis coordinates
consists of a set of values for each of these x and y coordinates. I use
persp function to give a surface. What I would like to know is, how I
can use the z-coordinates to plot a text label for select points on this
surface?
See ?trans3d and ?persp. Basically, do something like this:
pmat <- persp( .... )
text(trans3d( x, y, z, pmat), text=...)
This won't handle hiding text that falls behind things, but it should
work in simple cases. Another option is to use persp3d and text3d from
the rgl package.
Duncan Murdoch
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