set title "GNUFOR plot"
set xlabel "x"
set ylabel "y"
set parametric
set nosurface
set contour
set cntrparam levels 10
splot "test06_data.txt" using 1:2:3 with lines
set table "table.txt"
replot
unset table
set term x11
plot "table.txt" with lines
pause -1
q