# set terminal png transparent nocrop enhanced font arial 8 size 420,320 
# set output 'pm3d.23.png'
set border 895 lt -1 lw 1.000
set grid nopolar
set grid xtics nomxtics ytics nomytics noztics nomztics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid back
set style line 100 linetype 5 linewidth 0.500 pointtype 100 pointsize 1.000
set samples 20, 20
set isosamples 20, 20
unset surface
set size ratio 0 0.6,0.6
set origin 0.2,0.25
set ticslevel 0
set title "using now \"set pm3d solid; set grid back; unset colorbox\"" 0.000000,0.000000  font ""
set xrange [ * : * ] noreverse nowriteback  # (currently [-1.00000:1.00000] )
set yrange [ * : * ] noreverse nowriteback  # (currently [-1.00000:1.00000] )
set zrange [ * : * ] noreverse nowriteback  # (currently [-15.0000:60.0000] )
set cbrange [ * : * ] noreverse nowriteback  # (currently [-15.0000:4.00000] )
set pm3d at s
set pm3d scansautomatic flush begin noftriangles nohidden3d solid implicit corners2color mean
unset colorbox
splot y