From: <WH<arms@bf...>  20040804 15:42:34

hi list, i am looking for a way to plot isolines. so far i understand is the way plpoin3(). therefor you need z[x][y]. the problem is i have data for x=0...6000,y=0...9000. a simple field would become very expensive exspecialy if i have only 2500 point in total (uneven distributed). Is there a way to plot a "3D field" like plploin(N,x,y,z) ? regards, walter 