set grid set time set pointsize 1.5 set key left top set xlabel 'X' set ylabel 'T' plot 'Poisson_1Dp_3p1_T.dat' using 2:3 title 'analítico' with points 21 14 replot 'Poisson_1Dp_3p1_T.dat' using 2:4 title 'numérico' with lines linetype -1 linewidth 2 set title 'Poisson_1Dp_3p1_000.out, S(0)' replot