great ! looks good. I am sure, it'd work. Thanks a lot ! Regards, Suresh -- View this message in context: http://r.789695.n4.nabble.com/3D-surface-colour-based-on-the-values-of-X-or-Y-data-points-tp3060018p3060160.html Sent from the R help mailing list archive at Nabble.com.