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[Octave-bug-tracker] [bug #47974] Visual differences between gnuplot and

From: Dan Sebald
Subject: [Octave-bug-tracker] [bug #47974] Visual differences between gnuplot and OpenGL toolkits
Date: Wed, 21 Sep 2016 19:48:51 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0

Follow-up Comment #73, bug #47974 (project octave):

There looks to be some type of bug in 4.6.6.  I just tried 4.6.6 here.  I used
"drawnow" to generate some gnuplot code when Octave is using 4.6.6.  That code
has dashed lines under gnuplot 4.6.6 but looks correct under gnuplot 5.0.  I
think what is wrong with 4.6.6 is that it doesn't seem to recognize the
default declaration in the following gnuplot code:

set style line 63 default;
set style line 63 linecolor rgb "#d9262626" linetype 1 linewidth 0.500000;
, "-" binary format='%float64' record=53x1 using ($1):($2):($3):($4) title ""
with lines palette  \

If I force the linetype, i.e.:

, "-" binary format='%float64' record=53x1 using ($1):($2):($3):($4) title ""
with lines lt 1 palette  \

then the waterfall plot looks correct.

If x11 terminal looks different for you under some circumstances it is just
pointing out what the long-term complaint of gnuplot users was: dash patterns
were never coming out as expected.  It used to be that dash pattern, or
generally linetype, was terminal specific.  Still is, I guess.  And the way to
set X11 line patterns was to edit the file .Xdefaults.  No one ever thought to
get into so much detail with gnuplot and X11 so eventually gnuplot developers
introduce "linetype" and "dashtype" options to give better control.

Let me look at this over the next day or two and see if I can add the "lt #"
option without too much extra effort.


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