[Gnuplot-info] splot problem with lines

[<mc...@gm...>]

Dear gnuplot users,

I would be very happy and thankful for quick advice on the following:

I am using a data file with three columns:

x y z

They are however not at all ordered in size.

splot 'data' u 1:2:3 w l palette
results in the graph with too many gridpoints unnecessarily connected.

As one can easily see, too many points are connected with each other. Does anybody have any clue on how to avoid is? (Such as drawing lines only between nearest neighbors on this nonrectangular grid?)
Unfortunately, also pm3d does not work.

Thank you very much!

Peng