R help - Feb 2010 - Re : how to plot select points in preexisting persp plot

Hello,
I am trying to plot selected data points to a preexisting persp plot 
that satisfies a condition. I used the following statement -

text(coords[,1], coords[,2], names(act[which(act > 8.75)]), cex=0.7)
 But I get all the points labeled, instead of the points that satisfy 
the condition specified. Is there any way to plot only the points I 
want? Also can this be done using "trans3d" function. I found no
topics
pertaining to this issue.

Regards,
 Preeti

Preeti,

Could you please post a sample of your data and all the code? It is hard to
answer your question without knowing what "coords" and "act"
are


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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?
Hope it is clearer now.
Regards,
Preeti

Hello,
thanks a lot! I used which function with trans3d. It worked as well.
Regards,
Preeti