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[Octave-bug-tracker] [bug #52641] Changing legend "displayname" property

From: Rik
Subject: [Octave-bug-tracker] [bug #52641] Changing legend "displayname" property to empty string "" leads to printing an error
Date: Tue, 12 Dec 2017 16:08:23 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0

Update of bug #52641 (project octave):

                  Status:             In Progress => Fixed                  
             Open/Closed:                    Open => Closed                 


Follow-up Comment #9:

I checked in a new change that disables callbacks during the construction of a
legend object (http://hg.savannah.gnu.org/hgweb/octave/rev/b9462090773a). 
This is more efficient, and takes care of the issue reported here.  After
running a test in Matlab, i appears that empty labels are not displayed in a
legend.  I fixed the callback updateline() in legend.m to implement that.  I
tested with all three toolkits and the various fixes work.  Because empty
legend strings are not pushed forth from Octave, I don't think there needs to
be any change to the gnuplot interface to distinguish between 

title ""


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