legend NumColumns not working in 2018a

37 vues (au cours des 30 derniers jours)
Phil
Phil le 16 Sep 2021
Commenté : Phil le 17 Sep 2021
I'm using MATLAB 2018a, which I understand is when the NumColumns property of legend appeared. But when I run this code:
t = 2*pi*(0:0.01:1);
x1 = sin(t);
x2 = cos(t);
figure(1)
plot(t,x1)
hold %on
plot(t,x2)
hold %off
xlim([0 2*pi])
legend('sin(t)','cos(t)','NumColumns',2)
I receive these errors:
Error using legend>process_inputs (line 554)
Invalid argument. Type 'help legend' for more information.
Error in legend>make_legend (line 306)
[autoupdate,orient,location,position,children,listen,strings,propargs] = process_inputs(ha,argin);
%#ok
Error in legend (line 259)
make_legend(ha,args(arg:end),version);

Réponse acceptée

the cyclist
the cyclist le 16 Sep 2021
It looks to me that the documentation states the change was in R2018b, not R2018a.
As you can see, that code works fine here (R2021a):
t = 2*pi*(0:0.01:1);
x1 = sin(t);
x2 = cos(t);
figure(1)
plot(t,x1)
hold %on
Current plot held
plot(t,x2)
hold %off
Current plot released
xlim([0 2*pi])
legend('sin(t)','cos(t)','NumColumns',2)
  4 commentaires
the cyclist
the cyclist le 17 Sep 2021
Modifié(e) : the cyclist le 17 Sep 2021
I was looking at "Compatibility Considerations" ("legend interprets arguments as property names when property exists") in the documentation for legend.
Frankly, your reference seems to more definitively argue that this functionality should be there in R2018a. ¯\_(ツ)_/¯
(But @Steven Lord's comment is spot-on, I think.)
Phil
Phil le 17 Sep 2021
@Steven Lord Ah, that's it! NumColumns works in R2018a if I use a Legend object as you suggested. Thanks so much!

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