# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'smooth_path.1.png'
set border 3 front lt black linewidth 1.000 dashtype solid
set style fill  transparent solid 0.20 border rgb "black" 
set style data lines
set xtics border in scale 1,0.5 nomirror norotate  autojustify
set ytics border in scale 1,0.5 nomirror norotate  autojustify
set cbtics border in scale 1,0.5 nomirror norotate  autojustify
set title "Along-path spline fit to multiple sets of points\n" 
set xrange [ 0.00000 : 6.00000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set yrange [ 0.00000 : 6.20000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
NO_ANIMATION = 1
## Last datafile plotted: "$CURVES"
plot $CURVES using 1:2 with points ps 2 lc "steelblue" title "original points",      '' using 1:2 smooth path with filledcurves closed title "smooth path with filledcurves closed"