Add header to legend columns

Hello everyone,

I'd like to add a header to each column of a legend, which I manually did by calling the legend function with the parameter ('Box','off') and adding a rectangle around the legend as well as a text box containing the headers in bold (see attached file). Unfortunately, the grid can be seen through the legend by this method. How can I achive a better looking result without the grid lines in the rectangle?

Thanks for your help!

[Dyuman Joshi]

You can decrease the font-size of legend or change xticks/yticks.

Or do you want the Legend box to show above the grid in an opaque manner?

[dj1du]

The solution in an opaque manner could be working out for me perhaps, how can I do this?

[Mathieu NOE]

have you looked on the file exchange ? there are improved legend submissions that can do what you are loocking for

[Dyuman Joshi]

Does this work for you?

x = 0:0.01:10;
s=sin(x);
c=cos(x);
plot(x,s,x,c,x,s+c,x,s.*c,x,s-c,x,c-s)
grid on
ylim([-2.5 3.5])
l=legend({'sin', 'cos', 'sin+cos', 'sin*cos', 'sin-cos', 'cos-sin'}, 'Location', 'NorthWest', 'NumColumns', 2);
t=title(l,'plate:          cylinder:          ');

[dj1du]

This is almost perfect, but is there any way to hide/remove the line separating header and legend?

[Sulaymon Eshkabilov]

Use:

legend('box', 'off')   % Get rid off the box and line

[Dyuman Joshi]

There doesn't seem any way to remove that particular line.

The only other way seems to be, is that you draw two white lines and name their legend 'plate:' and 'cylinder:' to get what you want. Even in that case, alignment will be different.

x = 0:0.01:10;
s=sin(x);
c=cos(x);
plot(x,x*0,'w',x,s,x,c,x,s+c,x,x*0,'w',x,s.*c,x,s-c,x,c-s)
grid on
ylim([-2.5 3.5])
l=legend({'plate:', 'sin', 'cos', 'sin+cos', 'cylinder:','sin*cos', 'sin-cos', 'cos-sin'}, 'Location', 'NorthWest', 'NumColumns', 2);

%t=title(l,'plate:          cylinder:          ');

Answer 1

[Raghvi]

Hey,

Although it doesn’t create the desired spacing, you can try out the following piece of code:

lgd = legend({'1->2','3->4','1->2','3->4'},... 
    'Location','northwest','NumColumns',2); 
title(lgd,['plate:  '   'cylinder:']) 

Alternatively, you can work around by using two different legends for the different lines all together and provide them both with a separate title using the title function.

Refer to the following MATLAB Answer to understand how to do so:

https://www.mathworks.com/matlabcentral/answers/819715-how-can-you-have-two-different-legend-charts-on-the-same-plots-with-different-titles