# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'stringvar.2.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 label 1 "Exercise string handling functions\n\nfoo          = ABCDEF\nstrlen(foo)  = 6\nsubstr(foo,3,4) = CD\n\nhaystack     = `date`\nhaystack     = Fri Oct 28 21:05:38 PDT 2016\nneedle       = :\nS = strstrt(haystack,needle) = 14\nhaystack[S-2:S+2] = 21:05\nIt is now 21:05\n\nwords(haystack)   = 6\nword(haystack,5)  = PDT\n\nsprintf output of long strings works OK\n" at graph 0.1, 0.9, 0 left norotate back nopoint
set style textbox transparent margins  1.0,  1.0 border
unset logscale
set style data lines
unset xtics
unset ytics
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 yrange [ 0.00000 : 1.00000 ] 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 = "                                       1                                        2                                        3                                        4                                        5                                        6"
haystack = "Fri Oct 28 21:05:38 PDT 2016"
needle = ":"
S = 14
plot 0