In my completely unbiased opinion, you should use my tools!
feedgnuplot (http://github.com/dkogan/feedgnuplot) to plot stdin in
various flexible ways
vnlog (http://github.com/dkogan/vnlog) to manipulate textual tables in
various flexible ways
Starting with Carsten's modified example to add a header and to just
take one year for simplicity:
$ ( echo '# date value'; for m in {01..12}; do echo "2020-$m $RANDOM"; done) | tee /tmp/data.vnl
# date value
2020-01 16404
2020-02 13997
2020-03 30219
2020-04 32555
2020-05 1214
2020-06 24831
2020-07 4371
2020-08 17144
2020-09 10803
2020-10 18450
2020-11 2738
2020-12 6945
And I can plot:
$ < /tmp/data.vnl feedgnuplot --domain --timefmt '%Y-%m' \
--unset grid --lines --points \
--terminal 'dumb 80,40'
35000 +-------------------------------------------------------------------+
| + + + + + + + + + + + |
| |
| *A |
| *** * |
30000 |-+ A* * +-|
| * * |
| * * |
| * * |
| * * |
25000 |-+ * * A +-|
| * * * |
| * * ** |
| * * * * |
| * * * * |
20000 |-+ * * * * +-|
| * * * * |
| * * * * A |
| * * * * A ** |
| A** * * * * ** * * |
| ** * * * * * * * * |
15000 |-+ ** * * * * * * * +-|
| A * * * * * * * |
| * * * * * * * |
| * * * * * * * |
| * * * * A * |
10000 |-+ * * * * * +-|
| * * * * * |
| * * * * * |
| * * * * * |
| * * * * * **|
5000 |-+ * * * * *+-|
| ** A *** |
| * A |
| * |
| + + + + A + + + + + + |
0 +-------------------------------------------------------------------+
01/12/01/01/01/0201/03/01/0401/05/01/06/01/0701/08/01/09/01/10/01/1101/12/20
For the purposes of this email I'm using the dumb terminal, but most of
the time you'd omit that, and get a graphical, interactive plot. And
it's very, very flexible. Let's take only the data above 10000, plot
that AND that squared on the right-hand y axis, let's add a legend, and
let's put different text on the x axis for good measure
$ < /tmp/data.vnl vnl-filter 'value > 10000' -p date,value,square='value*value' |
feedgnuplot --domain --timefmt '%Y-%m' \
--vnl --autolegend --y2 square \
--set 'key bottom left' \
--set 'format x "%b"' \
--unset grid --points \
--terminal 'dumb 80,40'
35000 +---------------------------------------------------------+ 1.1e+09
| + + + A + + + + + |
| |
| |
| B +-| 1e+09
| |
| |
30000 |-+ B +-| 9e+08
| |
| |
| |
| +-| 8e+08
| |
| |
25000 |-+ +-| 7e+08
| B |
| |
| A |
| +-| 6e+08
| |
| |
| |
20000 |-+ +-| 5e+08
| |
| |
| +-| 4e+08
| B |
| B |
| |
15000 |-+ A +-| 3e+08
| A B |
| |
| +-| 2e+08
| A |
|square A |
| value B+ + + + + + + B |
10000 +---------------------------------------------------------+ 1e+08
Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct
And so on. Plenty of documentation and samples online. And both are in
Debian. AND if you want to do python, there's gnuplotlib (also mine, and
also in Debian)