Hello,
	The following code produces a quadrilateral:
		
		q<-matrix(c(1,3,1,2,3,1,2,4,2,1,4,2),nrow=4,byrow=T)
		qc<-xyz.coords(q)
		wireframe(z~y*x,qc)
	I have 2 questions
	1) How can i remove the bounding box i.e the cube encompassing the  
quadrilateral?
	2) Is there any function to get the 2D coordinates of the  
quadrilateral actually used in the final plot	? I could manually  
calculate the 2D co-ordinates of the projection of the quad if I knew  
the sequnce of 3D transformations 'wireframe' performed upto the  
final step before plotting.

	Thanks
	Saptarshi



Saptarshi Guha | sapsi@pobox.com | http://www.stat.purdue.edu/~sguha



	[[alternative HTML version deleted]]

