turning legend off in xline function

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Manisha RANJAN
Manisha RANJAN le 17 Avr 2019
Commenté : Adam Danz le 19 Déc 2022
How can I turn off legend of xline function being visible on the plot?
  1 commentaire
madhan ravi
madhan ravi le 17 Avr 2019
Modifié(e) : madhan ravi le 17 Avr 2019
Can you share a picture?, I don’t see any legend.

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Réponses (3)

Linjun He
Linjun He le 22 Fév 2020
You can simply use 'HandleVisibility' as follows:
xline(-1,'--r','HandleVisibility','off');
For those line you want to show the legend, you can use 'DisplayName':
plot(x, y, 'DisplayName', 'This is the legend for this line');
To show the legend:
legend('show');
  2 commentaires
Ann-Cathrin Krause
Ann-Cathrin Krause le 17 Déc 2022
I tried
xline(-1,'--r','HandleVisibility','off');
I wish it worked for me but it didnt.
Adam Danz
Adam Danz le 19 Déc 2022
@Ann-Cathrin Krause, I'm interested in seeing the section of code of plotting code where you're assigning xline and a screenshot of your plot showing the xline in the legend. The short demo below shows that constant line objects with HandleVisibility=off prevents the object from appearing in the legend.
figure()
plot(rand(2), '--')
xline(1.5,'HandleVisibility','off') % won't appear in legend
yline(0.5,'DisplayName', 'YLINE')
legend()

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Adam Danz
Adam Danz le 17 Avr 2019
Modifié(e) : Adam Danz le 23 Avr 2019
Option 1: Use object handles
Specity which objects should appear in the legend and produce the legend at the end after all plotting is complete.
figure
h1 = plot(rand(1,5), rand(1,5));
hold on
h2 = plot(rand(1,5), rand(1,5));
xline(0.5)
legend([h1, h2], {'first', 'second'})
Option 2: Turn off AutoUpdate
If you need to add stuff to the plot after you've created the legend, turn off AutoUpdate before adding the objects.
figure
h1 = plot(rand(1,5), rand(1,5));
hold on
h2 = plot(rand(1,5), rand(1,5));
legend([h1, h2], {'first', 'second'}, 'AutoUpdate', 'off')
xline(0.5)

Sean de Wolski
Sean de Wolski le 19 Avr 2019
Modifié(e) : Sean de Wolski le 19 Avr 2019
myxline = xline(10,'r',"Hello")
myxline.Label = ""
myxline.DisplayName = ""
Disable the label and/or DisplayName.
  3 commentaires
Sean de Wolski
Sean de Wolski le 19 Avr 2019
Modifié(e) : Sean de Wolski le 19 Avr 2019
I had myxline = in my command history, apparently failed to copy, doh!
Hello would be the label for the xline, was just showing how you might have the label or not.
In order to create the legend without the xline() don't call legend() directly, call it only on the graphics objects you want:
h = plot(1:10)
xline(3)
legend(h, "Hello World")
Adam Danz
Adam Danz le 19 Avr 2019
I see. "Hello" labels the line on the plot. That's a nice feature.
The legend handel suggestion matches the 'option 1' in my answer, too.

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