[Gnuplot-info] Combining a 3D and a 2D splot with no surface

[<mg...@fi...>]

Hi all,

I'm trying to combine the plotting of a heightmap (using contourlines) and
a line.

The .plot file basically is as follows:

set size square
set data style lines
set pm3d at b interpolate 10,10
set contour
set cntrparam bspline
set view map
unset surface
splot "results.dat" using ($2):($3):($1) notitle, "line.dat" using 1:2:(0)

The results.dat file contains X, Y and Z values, the line.dat file (which
represent a line y = 2-x) only contains X and Y values, with the Z value,
as you can see, set at a constant of 0.

I use 'unset surface' because otherwise a grid-like figure through the
datapoints in results.dat will be plotted, which is very much undesirable
in my case. However, this also means that the line represented by line.dat
is not plotted. Is this in any way avoidable? That is, can I draw the line
in line.dat without also having the plot the grid-like figure?

Kind regards,

Michiel