Re: [Gnuplot-info] Contour plot + reference function/contour

[Hans-Bernhard B. <br...@ph...>]

De la Fuente L=F3pez, Luis Fernando wrote:

> I' m using gnuplot to plot all my functions and data, but I do not know=
 how
> I can make a splot (controlling the countour levels) and also on the ba=
se to
> have a reference contour to compare if the contours are outside the
> reference. The reference is a data collection of points x,y that have t=
o be
> conected.

The base is just a plane of constant z.  The only difficulty is that by=20
default, it's z position is kept outside the actual plot's zrange.  But=20
that can be changed:

	set ticslevel 0

moves the base plane to the bottom of the zrange of your data.  Now,=20
you'll have to know where that bottom is, and fix it, e.g.:

	set zrange [z_bottom:*]

Now you can plot your data and the reference, e.g.

	plot 'datafile' with points, \
	     '' using 1:2:(z_bottom) with lines
	     'reference' using 1:2:(z_bottom) with lines