# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'custom_key.2.png'
set style fill   solid 1.00 border rgb "black" 
set key title "{/:Bold        Outcomes}" enhanced   left
set key outside right center vertical Left reverse enhanced autotitle nobox
set key noinvert samplen 1 spacing 1 width 0 height 0
set offsets 0, 0, graph 0, 0
unset xtics
set ytics border in scale 0,0 mirror norotate  autojustify
set ytics  norangelimit 0.00000,1 
set ztics border in scale 0,0 nomirror norotate  autojustify
set x2tics border in scale 0,0 nomirror norotate  autojustify
set x2tics  norangelimit 
set x2tics   ("A" 0.00000, "B" 1.00000, "C" 2.00000, "D" 3.00000, "E" 4.00000)
set cbtics border in scale 0,0 mirror norotate  autojustify
set rtics border in scale 0,0 nomirror norotate  autojustify
set title "{/:Bold Construct key from custom entries}" 
set xrange [ -0.500000 : 4.50000 ] noreverse
set x2range [ -0.500000 : 4.50000 ] noreverse
set yrange [ 3.50000 : -0.500000 ] noreverse
set palette rgbformulae -7, 2, -7
unset colorbox
NO_ANIMATION = 1
## Last datafile plotted: "$HEATMAP"
plot $HEATMAP matrix with image pixels notitle,     keyentry with boxes fc palette cb 0 title "no effect",     keyentry with boxes fc palette cb 1 title "threshold",     keyentry with boxes fc palette cb 3 title "typical range",     keyentry with labels title "as reported in [12]",     keyentry with boxes fc palette cb 5 title "strong effect"