# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'stringvar.2.png'
unset border
set label 1 "Exercise string handling functions" at graph 0.1, 0.95, 0 left norotate back nopoint
set label 2 "" at graph 0.1, 0.9, 0 left norotate back nopoint
set label 3 "foo          = ABCDEF" at graph 0.1, 0.85, 0 left norotate back nopoint
set label 4 "strlen(foo)  = 6" at graph 0.1, 0.8, 0 left norotate back nopoint
set label 5 "substr(foo,3,4) = CD" at graph 0.1, 0.75, 0 left norotate back nopoint
set label 6 "" at graph 0.1, 0.7, 0 left norotate back nopoint
set label 7 "haystack     = `date`" at graph 0.1, 0.65, 0 left norotate back nopoint
set label 8 "haystack     = Thu Nov 15 12:12:38 PST 2018" at graph 0.1, 0.6, 0 left norotate back nopoint
set label 9 "needle       = :" at graph 0.1, 0.55, 0 left norotate back nopoint
set label 10 "S = strstrt(haystack,needle) = 14" at graph 0.1, 0.5, 0 left norotate back nopoint
set label 11 "haystack[S-2:S+2] = 12:12" at graph 0.1, 0.45, 0 left norotate back nopoint
set label 12 "It is now 12:12" at graph 0.1, 0.4, 0 left norotate back nopoint
set label 13 "" at graph 0.1, 0.35, 0 left norotate back nopoint
set label 14 "words(haystack)   = 6" at graph 0.1, 0.3, 0 left norotate back nopoint
set label 15 "word(haystack,5)  = PST" at graph 0.1, 0.25, 0 left norotate back nopoint
set label 16 "" at graph 0.1, 0.2, 0 left norotate back nopoint
set label 17 "sprintf output of long strings works OK" at graph 0.1, 0.15, 0 left norotate back nopoint
set label 18 "" at graph 0.1, 0.1, 0 left norotate back nopoint
set style increment default
set style data lines
unset xtics
unset ytics
set xrange [ * : * ] noreverse writeback
set x2range [ * : * ] noreverse writeback
set yrange [ 0.00000 : 1.00000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
iswindows = 0
beg = 2
end = 4
foo = "                                       1                                        2                                        3                                        4                                        5                                        6"
haystack = "Thu Nov 15 12:12:38 PST 2018"
needle = ":"
S = 14
plot 0 lc bgnd notitle