Legend for fill_between plot

Can you please help me to create the correct code for this legend? i need to insert a legend for every filled area.

x = [1 2 3 4 5];

a = [5 9 3 2 1];

b = [6 11 2 4 5];

c = [11 2 4 1 6];

d = [6 1 3 0 5];

opts1={'EdgeColor', 'none',...

'FaceColor', [1 0.5 0.5]};

opts2={'EdgeColor', 'none',...

'FaceColor', [1 1 0]};

p1=fill_between(x,a,b,[], opts1{:},'facealpha',0.2);

hold on

p2=fill_between(x,c,d,[], opts2{:},'facealpha',0.2);

axis tight

hold off

legend([p1 p2],'Area 1','Area 2')

At the moment I managed to have only lines in the legend. I need the regtlangle with the color of the area instead.

Answer 1

[Antoni Garcia-Herreros]

Hello,

Not sure how your fill_between function works, but you can use the patch build in function, refer to this thread or this one.

x = [1 2 3 4 5];
a = [5 9 3 2 1];
b = [6 11 2 4 5];
c = [11 2 4 1 6];
d = [6 1 3 0 5];
opts1={'EdgeColor', 'none',...
    'FaceColor', [1 0.5 0.5]};
opts2={'EdgeColor', 'none',...
    'FaceColor', [1 1 0]};

p1=patch([x fliplr(x)], [a fliplr(b)], 'b','facealpha',0.2);
hold on
p2=patch([x fliplr(x)], [c fliplr(d)], 'r','facealpha',0.2);
axis tight
legend([p1 p2],'Area 1','Area 2')

[Star Strider]

@Antoni Garcia-Herreros — First, I appreciate your referencing my code!

Second, you can run posted code by using the green right-arrow RUN button in the top toolstrip, here giving:

x = [1 2 3 4 5];
a = [5 9 3 2 1];
b = [6 11 2 4 5];
c = [11 2 4 1 6];
d = [6 1 3 0 5];
opts1={'EdgeColor', 'none',...
    'FaceColor', [1 0.5 0.5]};
opts2={'EdgeColor', 'none',...
    'FaceColor', [1 1 0]};

p1=patch([x fliplr(x)], [a fliplr(b)], 'b','facealpha',0.2);
hold on
p2=patch([x fliplr(x)], [c fliplr(d)], 'r','facealpha',0.2);
axis tight
legend([p1 p2],'Area 1','Area 2')

.