Gnuplot ignoring missing data
dave at horsfall.org
Mon Jun 24 06:47:41 UTC 2019
(I was wondering why this list was quiet; it seems I was unsubscribed for some
I don't know whether this is Macports-specific or upstream, but I like to
identify my target before I open fire :-)
Sierra + latest patches (it won't go any further), Gnuplot 5.2 p6.
Have a look at www.horsfall.org/spamlog.pdf and note the weirdness at the
end; there is missing data there thanks to my ISP cutting my fibre and
taking ages to fix it (great anti-spam measure, I suppose).
In my spamlog.gp, I have:
set datafile missing "x"
plot datafile using 1:($2) lt rgb "red" title 'Reject', \
Sample line from spamlog.dat:
2019/04/26 x x x x x x x x x
(Actually tabs, not spaces)
Have I misunderstood what "missing" means? It's been a while since I
studied stats... My understanding is just that: missing data, hence leave
a hole in your graph (indistinguishable from zero in my case, but I can
A message on StackOverflow also says that the above should work and not
draw a line across it (not that I trust StackOverflow anyway), but that's
exactly what Gnuplot is doing.
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