CODEWITHSUNDEEP
matlabmatlab-figurelegendlegend-properties
Chris Toomer
Chris Toomer

Reputation: 23

Legend from two different plots on one single plot

So if I run my code I am supposed to get a legend for both the plots but I am getting only for one. Can someone please give a solution. I want both plots in one graph but the separate legend command is not working. The code is as follow:

close all;clear all;clc

load stiffhless

figure
plot(FI*180/pi,ktot);
xlabel('\psi [deg]');ylabel('k');
title('Stiffness coeff. of flapping motion eq.')
xlim([0,360])
set(gca,'XTick',0:45:360) 
grid on
legendCell=strcat('\mu=',strtrim(cellstr(num2str(mu_vect'))));
legend(legendCell)
hold on

load stiffarti
plot(FI*180/pi,ktot,'--');
xlabel('\psi [deg]');ylabel('k');
title('Stiffness coeff. of flapping motion eq.')
xlim([0,360])
set(gca,'XTick',0:45:360) 
grid on
legendCell=strcat('\mu=',strtrim(cellstr(num2str(mu_vect'))));
legend(legendCell)

Upvotes: 0

Views: 386

Answers (1)

Geoff
Geoff

Reputation: 1222

Per @dfri's comments, it's easiest for us to help you if you can produce a minimal, complete and verifiable example of the problem you're having (in doing so, you may even solve the problem yourself!).

Carefully reading relevant MATLAB documentation (legend) is also a great place to start when seemingly innocent commands aren't behaving the way you expect them to.

Those comments aside, here are two possible ways to include multiple legend entries:

If you want to add all legend entries at once, I believe this is a minimal version of your problem:

x=1:10; y=rand(1,10);
figure; plot(x,y);
legendCell='foo';
legend(legendCell);
hold on;
plot(x,-y);
legendCell='bar';
legend(legendCell);

If so, the second call to legend is overwriting the first call. In this case, @dfri's comment is exactly right -- this is what you mean to do:

figure; plot(x,y);
legendCell1='foo';
hold on;
plot(x,-y);
legendCell2='bar';
legend(legendCell1,legendCell2);

Or even better, no need for the legendCell1/2 variables:

legend('foo','bar');

only last legend entry both legend entries

If you need to add legend entries one at a time, here's one method to do so:

figure; plot(x,y);
L=legend('foo');

hold on;
plot(x,-y);
L=legend(L.String,'bar');

plot(x,2*y);
L=legend(L.String,'boo');

plot(x,-2*y);
L=legend(L.String,'far');

...

Assigning a variable name L to the legend object allows you to get a list of all existing legend strings L.String. So, by calling L=legend(...) again, you can essentially add elements to the existing list.

Upvotes: 1

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