# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 500, 350 # set output 'contours.20.png' set view 60, 30, 0.85, 1.1 set samples 25, 25 set isosamples 26, 26 set contour base set cntrparam bspline set cntrparam levels auto 10 set style data lines set title "3D gnuplot demo - contour of data grid plotting" set xlabel "X axis" set xrange [ 0.00000 : 15.0000 ] noreverse nowriteback set ylabel "Y axis" set yrange [ 0.00000 : 15.0000 ] noreverse nowriteback set zlabel "Z axis" set zlabel offset character 1, 0, 0 font "" textcolor lt -1 norotate set zrange [ -1.20000 : 1.20000 ] noreverse nowriteback splot "glass.dat" using 1