MATLAB: Controlling the size of legend markers separately from the font size of legend labels

Question

I need to control the markers in my legend separately from the font size of the legends' labels. Inspired by this previous answer, I used this code, in Matlab 2016a:

    x = 1:10;
    plot(x, 1*x, 'o')
    hold on
    plot(x, 2*x, 's')
    h_legend = legend({'one','two'});
    objhl = findobj(h_legend, 'type', 'line'); % objects of legend of type patch
    set(objhl, 'Markersize', 99); % set marker size as desired

Funnily enough, this solution worked for me for a few plots. However, after a while, now whatever I type in place of the 99, makes no difference. If I change the 'line' into 'patch, that also makes no difference. The problem I guess comes from the fact that objhl is actually empty:

    >> objhl = findobj(h_legend, 'type', 'patch')
    objhl = 
      0x0 empty GraphicsPlaceholder array.

Any thoughts? Many thanks!

Answer 1

A new MATLAB graphics system is introduced from MATLAB R2014b onwards. Your code will work for the older system I guess.

Use the code below if you are using MATLAB R2014b or later.

clc; close all;
x = 1:10;
plot(x, 1*x, 'o');
hold on;
plot(x, 2*x, 's');
[~, objh] = legend({'one','two'}); % Instead of "h_legend" use "[~, objh]"
objhl = findobj(objh, 'type', 'line');
set(objhl, 'Markersize', 15);