GnuPlot; Contour + Contour + Plot

[Stefan de Konink]

I want to plot two contours and a plot with datapoints on top of
eachother. I got the contours to work with hold on; But when I want to
plot on top of it with the original datapoints I get the following error:

gnuplot> sp '/var/tmp/oct-zU9WJn' u 1:2:3 t "line 1" w lines 1,
'/var/tmp/oct-vzTH1t' u 1:2:3 t "line 2" w lines 1, '/var/tmp/oct-UCFB0C'
u 1:2 t "" w dots 3,   '/var/tmp/oct-xwitFD' u 1:2 t "" w dots 1

^
         line 0: 2 columns only possible with explicit pm3d style (line 5)

Ofcourse I tryed the explicit style which produced a beautiful gradiant,
but that is not what I want ;)

How is this possible?


Yours Sincerely,

Stefan de Konink