# set terminal png transparent nocrop enhanced font arial 8 size 420,320 
# set output 'pm3d.23.png'
set border 895 front linetype -1 linewidth 1.000
set grid nopolar
set grid xtics nomxtics ytics nomytics noztics nomztics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid layerdefault   linetype 0 linewidth 1.000,  linetype 0 linewidth 1.000
set style line 100  linetype 5 linewidth 0.500 pointtype 100 pointsize default
set view map
set samples 11, 11
set isosamples 11, 11
unset surface
set style data pm3d
set style function pm3d
set ticslevel 0
set nomcbtics
set title "Datafile with different nb of points in scans; pm3d flush begin" 
set xlabel "X LABEL" 
set xrange [ * : * ] noreverse nowriteback  # (currently [-1.00000:1.00000] )
set ylabel "Y LABEL" 
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 lmargin 0
set pm3d implicit at b
set pm3d scansforward
splot 'triangle.dat'