1 set terminal png 2 set output "plotC.png" 3 set xlabel "x.r" 4 set ylabel "x.i" 5 set zlabel "y" 6 set title "Integration along a complex path" 7 set grid 8 splot "funcC.dat" u 1:2:3 t "y.real" w lp, "" u 1:2:4 t "y.imag" w lp 9