MATLAB: Filling between several curves in a figure using fill or patch functions

Question

Hi

I have a figure, in which 4 curves are plotted. I want to fill between these curves twp by two with a specific color (red, green, …) I attached the plots I want to fill. How can I do that?

Thanks

Answer 1

See this example

y = 1:400;
x1 = 0.1*rand(size(y));
x2 = 0.1*rand(size(y))+1;
x3 = 0.1*rand(size(y))+0.4;
x4 = 0.1*rand(size(y))+1.4;
ax = axes();
hold(ax);
plot(x1, y);
plot(x2, y);
Y = [y fliplr(y)];
X = [x1 fliplr(x2)];
p = patch(X, Y, 'r', 'FaceAlpha', 0.2);
Y = [y fliplr(y)];
X = [x3 fliplr(x4)];
p = patch(X, Y, 'g', 'FaceAlpha', 0.2);