how to draw the data set processed by hclust?

hi, all

   i hava a dataset formated as follow:

	x1 y1 z1
	x2 y2 z2
	x3 y3 z3
	...	

	how to cluster it with hclust?
	and the draw the data with color of cluster?

	thank you in advance!

best!
xpsun