How to change symbol size and contour size in legend simultaneously?

I wanted to make the marker size of scatter plot larger and the token size of the contour symbol in legend smaller, so I used the following code:

x=1:20;
a=rand(20,20);

figure; hold on
scatter(3,4)
contour(x,x,a)

h=legend('sp','cp');
h.ItemTokenSize = [10,5]; % Make both symbols smaller

To make the marker size of the scatter plot larger, I tried to get icons:

[h,icons]=legend('sp','cp');
h.ItemTokenSize = [10,5]; % Doesn't work anymore
icons = findobj(icons,'Type','patch');
icons = findobj(icons,'Marker','none','-xor');
set(icons(1),'MarkerSize',12); % To make scatter plot marker size larger

However, I lose control over the contour token size.

Can anyone please help me with this? Thanks!

Answer 1

[Gouri Chennuru]

Hi Jing,

You can open MATLAB 2020a and execute the following code,

x=1:20;
a=rand(20,20);
figure; 
hold on
scatter(3,4)
contour(x,x,a)
[h,icons]=legend('sp','cp');
h.ItemTokenSize = [10,5]; 
icons = findobj(icons,'Type','patch');
icons = findobj(icons,'Marker','none','-xor');
set(icons(1),'MarkerSize',12); 

This code works fine in MATLAB 2020a.

If you are still facing the issue, provide additional information so that issue will be resolved.

Hope this Helps!

[Joscha Weinert]

Hello,

I am facing the same issue.

My figure plot is based on an app designer program.

To adjust the length, I can use:

leg.ItemTokenSize = [x1,x2];

If I generate the Legend by

leg = legend(...);

So it works fine.

But I also want to adjust the marker size afterwards.Therefore I need the icons. So i use

[leg, icons] = legend(...);
h = findobj(icons,'type','patch');
set(h,'MarkerSize',1);

So I can adjust the marker size, but I can't change the length of the markers or lines in the legend no more.

Either way, one of my options gets lost.

@Gouri Chennuru: I tried your code and it worked. In another thread was mentioned, that app designer could be the problem. But maybe you have a solution. That would be really great. Maybe there is way to get the icons without this code:

[leg, icons] = legend(...);    

Thank you in advance.