Legend of a patch-object with a line in the center

Hi,

I am looking for a way to have a custom legend entry for a filled area plot along with a line plot where the individual legend entries would be combined into one entry. The single entry should have the line marker overlaid on top of the box of the filled area legend. Is this possible?

x = [0 1];
y = [1 0];

xArea = [x, fliplr(x)];
yArea = [y + 1, fliplr( y - 1 )];

figure();
hold on;

hp = plot( x, y);
hp.LineWidth = 2;
hp.HandleVisibility = 'off';

hf = fill( xArea, yArea, [0, 0.4470, 0.7410]);
hf.FaceAlpha = 0.25;
hf.LineStyle = 'none';

hLeg = legend('Single legend entry');
hLeg.FontSize = 30;

Result of the example code:

Desired look of the legend entry:

[darova]

The question is unclear. Can you make a simple drawing or something?

Answer 1

[darova]

What about this? Too complicated? No?

clc,clear
cla
[X,Y,Z] = peaks(5);
p = surf2patch(X,Y,Z);
p1 = patch(p,'facecolor','g');
h = legend('ha');
h1 = get(h,'children');
x = get(h1(1),'xdata');
y = get(h1(1),'ydata');
% c = get(h1(1),'faceVertexCData');
x = [x; x(1); x(end)];
y = [y; mean(y); mean(y)];
c = [ repmat([0 1 0],[4 1]); repmat([1 0 0],[2,1]) ];
ff = [1 2 3 4; 5 6 6 6];
set(h1(1),'vertices',[x y],...
    'faces',ff,...
    'faceVertexCData', c,...
    'edgecolor','flat')

[Teemu Harkonen]

Thank you for the answer! I believe this approach might work in versions earlier than 2014b where they made significant changes to the graphics objects.

Using your solution as a template, I was able to do this in MATLAB 2019b by:

x = [0 1];
y = [1 0];

xArea = [x, fliplr(x)];
yArea = [y + 1, fliplr( y - 1 )];

blue = [0, 0.4470, 0.7410];

figure();
hold on;

hp = plot( x, y);
hp.LineWidth = 2;
hp.HandleVisibility = 'off';

hf = fill( xArea, yArea, blue);
hf.FaceAlpha = 0.25;
hf.EdgeColor = 'none';

[hLeg, legObj] = legend('Single legend entry $\hspace{1cm}$', 'interpreter', 'latex');
hLeg.FontSize = 30; % Without these (hspace and fontsize) the legend box size is too small

texts = legObj(1);
p = legObj(2);

p.FaceAlpha = 0.25;
p.LineWidth = 2;
texts.FontSize = 30;

x = get( p,'xdata');
y = get( p,'ydata');
x = [x; x(1); x(end)];
y = [y; mean(y); mean(y)];
c = [ repmat([1, 1, 1],[4 1]); repmat(blue,[2,1]) ];
ff = [1 2 3 4; 5 6 6 6];
set( p,'vertices',[x y],...
    'faces',ff,...
    'faceVertexCData', c,...
    'edgecolor','flat')

Thank you for the help!

[darova]

You are welcome!