Multiple legands with semilogy

I am using a loop to plot multiple plots in the same windows I would like to use mutliple legands to identify each data set. When i try to use legend('label1','label2') it says:

"Warning: Ignoring extra legend entries."

and when I attempt to call legend multiple times it simply replaces the old legend. I would prefer if there is a way i could call legend each time I add a new data set to the graph.

Answer 1

[Gurudatha Pai]

My guess is that you are probably using more strings in legend(); e.g: you are plotting only one array and passing two legend strings like below

plot(x,y);
legend('labels', 'label2');

you could probably do

h= figure();
plot(x,y)
hold on
plot(x, y2);
legend('labels', 'label2');

You could as well do something like this for each of your plots

h= figure();
hold on
plot(x,y);
legendmat = [legendmat;  'label1']
legend(legendmat)
% some other code
figure(h)
plot(x, y2);
legendmat = [legendmat;  'label2']
legend(legendmat)
% some other code
figure(h)
plot(x, y3);
legendmat = [legendmat;  'label3']
legend(legendmat)

Answer 2

[SUDIP PODDAR]

??? Undefined function or variable 'legendmat'. give this error . what is the solution?

[Muhammad Anjum Qureshi]

Add

legendmat = ''

only before first

legendmat = [legendmat; 'label1']