Without seeing your code (and your MATLAB version, although I’m not certain how relevant that is in this instance), it’s not possible to determine precisely what the problem is.
Using the 'DisplayName' property works here —
t = linspace(0, 1, 250);
y = sin([1;3;5;7]*2*pi*t);
figure
yyaxis left
hold on
for k = 1:3
hpl(k) = plot(t, y(k,:), 'DisplayName',"Curve "+k);
end
hold off
yyaxis right
hpr = plot(t, y(4,:), 'DisplayName',"Curve "+4);
legend('Location','best')
I added the plot handles in case it’s necessary to pass them as the first argument to the legend call, although that’s not necessary here. It may be necessary for you to use them, so I included them.
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