Gnuplot: Scatter plot of a diffuse dataset

Question

I have a file with scattered data, consisting of 7 columns and more than 8000 thousand rows ( data file ). I would like to build a contour for this data. The columns that I would like to build are the first, second and last (seventh), giving a 2d and 3d graph as follows:

Front view:

Edge Type:

And simple 3d:

As can be seen from the second graph, the first is that the points are clustered in a certain place in the 2d region, the same region in which there is a minimum that can be seen in the three-dimensional graph. But secondly, these points are randomly distributed in the plane (second digit), and I believe that I can not use the matrix representation to draw iso-z outlines.

gnuplot set contour base cntrparam levels ?

Answer 1

( ). set dgrid3d . , help set dgrid3d . , :

set dgrid3d 50,50 gauss 10e-6,10e-6
set logscale z
splot "fort.12" u 1:2:7 w l

. gnuplot , 50x50 ( , ), , , " ". , , , , , .

:

set view map
unset surface
set contour
splot "fort.12" u 1:2:7 w l

, , , set dgrid3d ...; set table "somefile"; plot ...; unset table; unset dgrid3d; plot "somefile" ... (.. ), gnuplot .