# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'iris.2.png'
set border 3 front lt black linewidth 1.000 dashtype solid
set style fill  transparent solid 0.30 border
set key title "Iris Species" font ":Bold"  center
set key outside right top vertical Left reverse enhanced autotitle nobox
set key invert samplen 4 spacing 1 width 0 height 0
set key maxcolumns 0 maxrows 0 offset screen -0.3, -0.2
set offsets 0.5, 0.5, 0.5, 0.5
set datafile separator ","
set datafile columnheaders
set size ratio 1 1,1
set style data lines
set xtics border in scale 1,0.5 nomirror norotate  autojustify
set xtics  rangelimit autofreq 
set ytics border in scale 1,0.5 nomirror norotate  autojustify
set ytics  rangelimit autofreq 
set cbtics border in scale 1,0.5 nomirror norotate  autojustify
set title "{/:Bold Concave Hull       chi\\_length = 1.5 expand 0.1}" 
set title  offset character 0, -2, 0 font "" textcolor lt -1 norotate
set xlabel "Sepal Width" 
set xrange [ * : * ] noreverse writeback
set x2range [ * : * ] noreverse writeback
set ylabel "Petal Length" 
set yrange [ * : * ] noreverse writeback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set colorbox vertical origin screen 0.9, 0.2 size screen 0.05, 0.6 front  noinvert bdefault
species(name) = strstrt(name,"setosa") ? 1               : strstrt(name,"versicolor") ? 2               : strstrt(name,"virginica") ? 3               : 0
NO_ANIMATION = 1
chi_length = 1.5
## Last datafile plotted: "iris.dat"
plot for [s=1:3]     'iris.dat' using (species(strcol(5)) == s ? $2 : NaN) : 3     concavehull smooth path expand 0.1 with polygon lc s notitle,         '' using 2:3:(species(strcol(5))) with points pt 12 lc variable notitle,         keyentry with ellipse lc species("setosa") title "setosa",     keyentry with ellipse lc species("versicolor") title "versicolor",     keyentry with ellipse lc species("virginica") title "virginica"