grads -pb <<EOF
sdfopen NCARreanal200.nc
set grads off
d hgt
d ugrd;vgrd
run cbarn
draw title 200 mb geopotencial height surface and real wind
enable print tmp.gm
print
disable print
quit
EOF

gxgif -i tmp.gm -o ejemplo2source.gif
rm -f tmp.gm

grads -pb <<EOF
sdfopen gwind200.nc
sdfopen NCARreanal200.nc
set grads off
d hgt.2
d gw_u;gw_v
run cbarn
draw title 200 mb geostrophic wind generated by ejemplo2.py
enable print tmp.gm
print
disable print
quit
EOF

gxgif -i tmp.gm -o ejemplo2.gif
rm -f tmp.gm