[Octave-bug-tracker] [bug #53888] figure handle is not cleared in gnuplot

[Lars Kindermann]

Follow-up Comment #7, bug #53888 (project octave):

Actually, for plotting serial time data it would be sufficient to subtract an
offset to center the data around zero. The problem arises from the fact that
serial date's zero is 2000 years in the past. So two consecutive seconds now
just differ in the 36th bit:


>> log2(now/(now-1/24/60/60)-1)
ans = -35.894


I was already looking into the plot and datetick code but found no easy way to
introduce scaling / offsetting before sending data to qt. Everything must be
done transparent in both directions for interactive zooming etc. It would be a
massive rewrite of the plot code as scale factors and offsets have to appear
in many places.

I work a lot with geoscience data where timestamps have millicecond precision
and span decades. Porting even small scripts from matlab to octave can become
a real hazzle when using qt.



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