[R] Re : how to plot select points in preexisting persp plot

Preeti Iyer iyer at bit.uni-bonn.de
Tue Feb 23 12:01:01 CET 2010

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 
Hope it is clearer now.

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