MATLAB Answers

How to set legend marker size

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RuiQi
RuiQi on 16 Jul 2017
Commented: Carl Witthoft on 5 Feb 2020
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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Carl Witthoft
Carl Witthoft on 4 Feb 2020
Walter, thanks for reminding me of that bit.
I'll go back and re-test my code snippets.
z8080
z8080 on 5 Feb 2020
Ah yes, all clear now, thanks to both for clarifying!
Carl Witthoft
Carl Witthoft on 5 Feb 2020
Yep, my apologies for the rant. All is working here as well.

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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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