MATLAB Answers

How to set legend marker size

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RuiQi
RuiQi on 16 Jul 2017
How do I change the marker size on the legend ? I can change the font size but not marker.
l = legend('Orientation', 'Horizontal', 'RNN (Ours)', 'SLIC', 'SEEDS', 'LSC', 'ERS', 'FH');
l.FontSize = 20;
%l.MarkerSize = 20; does not work
%l.markersize = 20; does not work
set(l,'Position', [0.4 0 0.2 0.2], 'Units', 'normalized');
%set(l,'MarkerSize', 20); does not work

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Answers (3)

Carl Witthoft
Carl Witthoft on 11 Apr 2019
Best way: see Stackoverflow question 2871747
% thanks to , Luis Mendo and Lea
[~, objh] = legend({'one plot', 'another plot'}, 'location', 'NorthWest', 'Fontsize', 14);
%// set font size as desired
% note that even if you plot(x,y,'.') it's a "line" plot
objhl = findobj(objh, 'type', 'line'); %// objects of legend of type line
set(objhl, 'Markersize', 12); %// set marker size as desired
% or for Patch plots
objhl = findobj(objh, 'type', 'patch'); % objects of legend of type patch
set(objhl, 'Markersize', 12); % set marker size as desired

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Walter Roberson
Walter Roberson on 11 Apr 2019
If I recall correctly, R2018b / R2019a do not use line objects inside legends anymore.
I would need to recheck to be sure.
Abhijeet chausalkar
Abhijeet chausalkar on 3 May 2019
The command line with 'patch' worked for me in Matlab 2018a. I was really struggling to change the marker size using the code to plot a descent figure. Thanks Carl Witthoft.

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Akira Agata
Akira Agata on 16 Jul 2017
How about changing the marker size of your plot? Here is an example.
plot(magic(4),'o','MarkerSize',10);
l = legend('a','b','c','d');

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Walter Roberson
Walter Roberson on 16 Jul 2017

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Fernon Ejikhoudt
Fernon Ejikhoudt on 11 Jul 2018
I have the same problem and I'm using 2018a. Is there an answer to this. otherwise it almost makes the printed graphs useless because of the extremely tiny dots.
Walter Roberson
Walter Roberson on 11 Jul 2018
Did you experiment with Kelly's legendflex() ?

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