set terminal png
set output "fig_GRPARATP.png"
set title "Heat transmission boundary"
set xlabel "Time (hr)"
set ylabel "Temperature (deg.C)"
set xtics 100.000000
set format x "%.0f"
set ytics 10.000000
set format y "%.0f"
set xrange [0.000000:1000.000000]
set yrange [0.000000:50.000000]
set grid xtics ytics mxtics mytics
plot \
"temp.prn" using 1:2 with lines linewidth 2 title "Node-1", \
"temp.prn" using 1:3 with lines linewidth 2 title "Node-2", \
"temp.prn" using 1:4 with lines linewidth 2 title "Node-3"