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CREO is way more suitable to create 3d plots with than Excel.
I created random coordinates within "parametric shapes" (sphere, cylinder and cone) in excel and imported these as datum points in CREO 2.0. Then I patterned small revolved circles on all datum points with a few clicks. Now I think I basically know how parametric shapes work. For some renderings, see: http://grabcad.com/library/frozen-wine-glass-with-droplets-random-pattern-from-parametric-shapes-in-excel-creo