szTerm = 0
if(szTerm == 0) set terminal X11
if(szTerm == 1) set terminal pdf size 8,5
if(szTerm == 2) set terminal png size 800, 600
set rmargin 14

set xlabel "independant variable name"

set xrange [0:100]
set xtics 10
set mxtics 10

set format x "%0.0s %cxunits"

set key bottom right
set grid

set yrange [-50.0:100.0]
set ytics 10
set mytics 10
set format y "%0.0s %cC"

set title "Temperature"
if(szTerm == 1) set output "temperature_plot.pdf"
if(szTerm == 2) set output "temperature_plot.png"

plot "mydata.dat" using 0:1 title "temperature" with linespoints

if(szTerm == 0) pause -1

set yrange [80000:100000]
set ytics 1000
set mytics 10
set format y "%0.0s %cPa"

set title "Pressure"
if(szTerm == 1) set output "pressure_plot.pdf"
if(szTerm == 2) set output "pressure_plot.png"

plot "mydata.dat" using 0:2 title "pressure" with linespoints

if(szTerm == 0) pause -1

set yrange [0.0:1000.0]
set ytics 100
set mytics 10
set format y "%0.0s %cm"

set title "Altitude"
if(szTerm == 1) set output "altitude_plot.pdf"
if(szTerm == 2) set output "altitude_plot.png"

plot "mydata.dat" using 0:3 title "altitude"       with linespoints \
     "mydata.dat" using 0:4 title "altitude, real" with linespoints

if(szTerm == 0) pause -1