gnuplot - How can I plot several charts from a set of sample data? -


i've got dataset i'd generate set of plots from, , i'm having trouble getting gnuplot it.

i've got dataset following columns:

  • time (timestamp in iso-8601 format yyyy-mm-ddthh:mm:ss.sssz)
  • client (hostname of client; 2 distinct clients in dataset)
  • server (hostname of server; 8 distinct servers in dataset)
  • two related stats, a1 , a2
  • two other related stats, b1 , b2

a given timestamp has single sample in it. have around 7000 rows in dataset. example rows like:

time                | client   | server   | stat a1 | stat a2 | stat b1 | stat b2 --------------------+----------+----------+---------+---------+---------+-------- 2015-04-01t03:47:12 | client-x | server-1 | 12.2    | 20.0    |  2.3    |  7.0 2015-04-01t03:49:09 | client-y | server-6 | 15.0    | 25.2    | 10.0    | 15.2

i'd generate 4 plots, line charts, 1 every combination of related stats , client.

  1. client-x , stats a1 , a2
  2. client-x , stats b1 , b2
  3. client-y , stats a1 , a2
  4. client-y , stats b1 , b2

at point, @ at complete loss how approach gnuplot. i'm open other options generating plot, needs scriptable new/updated datasets.

in order line plots, must data filtering outside of gnuplot, e.g. awk:

first setup time format with

set xdata time set timefmt '%y-%m-%dt%h:%m:%s'

then extract possible client name, unless know possible client names:

clients = system("awk '!/^#/ { print $2 }' test.dat | sort | uniq")

and plot data using multiplot

set style data lines set multiplot layout 2,2  [client in clients] {     set title sprintf("client '%s'", client)     plot sprintf('< grep ''\b%s\b'' test.dat', client) using 1:4 title "a1", '' using 1:5 title "a2"     plot sprintf('< grep ''\b%s\b'' test.dat', client) using 1:6 title "b1", '' using 1:7 title "b2" } unset multiplot

the question quite similar how use 1 of column of data legend in gnuplot?.


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