search for: linair

...Now, the x,y and z data going into contour() are supposed to be ordered. My question is: Is their a quick way to re-arrange my data such that it can be fed to contour()? I know about interp(). However, using this, I found some strange quirks in the interpolation that I would rather not see (both linair and non linear interpolation). I have plotted my data with plot3d() in the RGL package. This works fine. But I need a 2d plot (x~y projection). Maybe I can color the plot3d() plot and use a projected version? Any ideas are welcome, Regards, Dieter