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   "$d_SysMaint"'graphs, plots/0_gnuplot notes.txt'  - ???
   columns are 1-indexed (start at 1, not zero) : 
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   08Jun2025 list of gnuplot paths on my "$d_web" drive
   09Dec2022 scatterplot setup
   02Aug2022 gnuplot yDetrend after all changes
   21Jul2022 search "gnuplot bold text", unset, size
   19Jul2022 search "gnuplot set label text color", tc lt 100 = set text color to that of line type 100 
   24May2021 search "gnuplot and how do I set dashed lines?"
   25Mar2021 search "gnuplot and how do I use multiple y axis?"
   31Jan2021 search "gnuplot and how to color an area"
   07Jan2021 search "gnuplot and how do I change font size?"
   07Jan2021 search "gnuplot and date formats"
   29Dec2020 search "gnuplot and key columnhead"
   20Sep2020 search "gnuplot and how do I remove the title and labels?"
   19Sep2020 search "gnuplot and what is the special character for a tab?"
   15Sep2020 search "gnuplot and how do I plot a VERTICAL LINE?"
   12Sep2020 search "http://lowrank.net/gnuplot/tics-e.html"
   It is possible to place an arbitrary text at the tics position instead of the numbers. you can write "April", "May", "June", and "July" at the positions X=1,2,3, and 4, by the following way.
   	gnuplot> set xtics ("April" 1, "May" 2, "June" 3, "July" 4)
   	gnuplot> plot "test.dat" using 1:2:3 notitle with boxes, "test.dat" using 1:2   notitle with lines
   12SSep2020 transform the dates of the SP500 data to decimal years, convert to 83yr-detrended log
   11Jul2020 To setup gnuplot scripts for each year of suicide. rather than bash, use : 
   10Jul2020 search "Linux gnuplot and how do I color lines?", other [line, setup] stuff