# gnuplot_contour_commands.txt
# usage: gnuplot < gnuplot_contour_commands.txt
#
set term png
set size ratio -1
set output 'gnuplot_contour.png'
set pm3d
unset surface
set view map
set contour
set nokey
set cntrparam cubicspline  # smooth out the lines
set cntrparam levels 50    # sets the num of contour lines
set pm3d interpolate 20,20 # interpolate the color
set palette model RGB defined ( 0'black', 1'blue', 2'cyan',3'green',4'yellow',5'red',8'purple' )
set xlabel '<--X-->'
set ylabel '<--Y-->'
set title 'Solution contours'
set timestamp
set dgrid3d 10, 10, 1
splot 'gnuplot_contour_data.txt' with lines lt 1