How can I change the appearance of the lines in the legend in a MATLAB figure?

I want to alter the appearance of the lines in the legend in my MATLAB figure. For example, the markers are too small and difficult to see. I would like to make them larger.

Answer 1

[MathWorks Support Team]

The handles for the line objects in the legend are returned as part of the output from LEGEND. You can use the SET command to change the properties if you have the lines' handles:

x = 1:10;

y1 = rand(1,10); % 10 random numbers 

y2 = randn(1,10); % 10 normally distributed random numbers 

plot(x,y1,'rx--',x,y2,'bo-')

[legh,objh] = legend('curve1','curve2'); % handles to the legend and its objects

There would be two line objects each (4 in total) associated to each of the line objects in the original plot.This can be found by:

% find the handles in 'objh' that correspond to line objects

lineh = findobj(objh,'type','line')

Two are used to display the lines' LineStyle with their Marker property set to 'none'. The other two are used to display the same markers as the lines in the plot with their linestyles set to 'none'. Setting the MarkerSize will only affect the appearance of the lines that have markers.

% set the marker size

set(lineh,'MarkerSize',10)