You're saying you call
legend([h hh hhh], ...)
each time around the loop? That means that each time you're telling legend to forget about the items from the previous iteration and focus on these 3 new objects.
You'll want to move legend out of the loop. You could do something like this:
g = gobjects(1,9);
for i=1:3
[h, hh] = errorbar_x_one( ...
hhh = plot( ...
g(end+1) = h;
g(end+1) = hh;
g(end+1) = hhh;
end
legend(g)
But if you're really putting everything into the legend, then you don't need to give it the handles. So you may be able to do something as simple as this:
for i=1:3
[h, hh] = errorbar_x_one( ...
hhh = plot( ...
end
legend show
