set terminal png
set output "fig_GRL.png"
set xlabel "Period (sec)"
set ylabel "Response spectrum (gal)"
set logscale x
set mxtics 10
set logscale y
set mytics 10
set xrange [0.010000:10.000000]
set yrange [1.000000:10000.000000]
set grid xtics ytics mxtics mytics
plot "temp.prn" with lines linewidth 2 title "EL-Centro"