In GNUPlot you can make 3d plots based on a .dat file with a matrix notation:
#Y 0.1 0.2 0.3 0.4
0 1 4 9 #X = 1
1 2 5 10 #X = 2
4 5 8 13 #X = 3
9 10 13 18 #X = 5
16 17 20 25 #X = 7
25 26 29 34 #X = 10
However the file I want to plot has some changes in X-distance between the lines. As shown in comment. One can use set xtics
but that only changes the numbers on the plot, while the points should be plotted on a linear axis.
Is there a way to do this?