set terminal png
set output "fig_SIMP1.png"
set xlabel "time (sec)"
set ylabel "Displacement (mm)"
set xtics 100.000000
set format x "%.0f"
set ytics 2.000000
set format y "%.0f"
set xrange [0.000000:800.000000]
set yrange [-10.000000:10.000000]
set grid xtics ytics mxtics mytics
plot \
"temp0.prn" with points pointtype 1 title "Input data", \
"temp1.prn" with lines linetype 3 title "Estimated"