# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'stringvar.5.png'
set bar 1.000000 front
set style circle radius graph 0.02, first 0.00000, 0.00000 
set style ellipse size graph 0.05, 0.03, first 0.00000 angle 0 units xy
set style textbox transparent margins  1.0,  1.0 border
unset logscale
set style data lines
unset paxis 1 tics
unset paxis 2 tics
unset paxis 3 tics
unset paxis 4 tics
unset paxis 5 tics
unset paxis 6 tics
unset paxis 7 tics
set title "Constant string expressions as plot symbols" 
set xrange [ 250.000 : 500.000 ] noreverse nowriteback
set paxis 1 range [ * : * ] noreverse nowriteback
set paxis 2 range [ * : * ] noreverse nowriteback
set paxis 3 range [ * : * ] noreverse nowriteback
set paxis 4 range [ * : * ] noreverse nowriteback
set paxis 5 range [ * : * ] noreverse nowriteback
set paxis 6 range [ * : * ] noreverse nowriteback
set paxis 7 range [ * : * ] noreverse nowriteback
set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.05, 0.6, 0 front  noinvert bdefault
beg = 2
end = 4
foo = "Apostrophes inside words don't matter"
haystack = "Fri Oct 28 21:05:38 PDT 2016"
needle = ":"
S = 14
x = 0.0
## Last datafile plotted: "silver.dat"
plot 'silver.dat' u 1:2:($3+$1/50.) w filledcurves above title 'Above',      '' u 1:2:($3+$1/50.) w filledcurves below title 'Below',      '' u 1:2 lt -1 lw 0.5 notitle,      '' u 1:($3+$1/50.) lt 3 lw 0.5 notitle,      '' using 1:2:( ($2>($3+$1/50.)) ? "Up" : "Dn" ) with labels         title 'plot <foo> using 1:2:( ($3>$2) ? "Up" : "Dn" ) with labels'