having legend title and enlarging legend marker size at the same time

Initially I had a legend as like this

As you can see, the size of the legend marker is much smaller than the size of the scatter marker. However, the legend has a title. I used below code for this:

lgd=legend('25','50','75','100','Location','northwest','FontSize',30);  
lgd.Title.String = 'Recoating Velocity (%)';
lgd.Title.FontSize = 30;

Then, in order to increase the marker size in the legend, I used the icons as below:

[lgd,icons,plots,legend_text] = legend('25','50','75','100', 'Location', 'Northwest')
for k = 5:8
    icons(k).Children.MarkerSize = 20;
end
lgd.Title.String = 'Recoating Velocity (%)';
lgd.Title.FontSize = 30;

And the result looks like this:

Although the marker size increased, but the legend title is not applied. Why is that? How to fix it?

Answer 1

[Gautam]

Hello @CS

It is a known problem that a title to a legend cannot be added when calling the "legend" function with multiple outputs. In fact, calling the function this way is not recommended by MathWorks since the release R2014b and will be removed in a release after R2024b.

Please refer to the "Version History" section of the below MathWorks documentation.

https://www.mathworks.com/help/matlab/ref/legend.html