Fill/patch with different colors

Hi there, i want to display my behavioral data as filled areas over time.

x = [1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8];
y = [0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0];

a = fill(x,y,'b');
a.FaceAlpha = 0.1;
xlabel('time [s]')

Something simple like that. However, i want for example the second and third area to be the same color because they are the same behavior and the first and last be something different. How do i do that ? I already read through the patch/fill manual but didn't figured it out. A huge thank you in advance!

[Mathieu NOE]

hello

this is it :

x = [1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8];
y = [0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0];
colour = [1 1 1 1 0 0 0 0 0 0 0 0 2 2 2 2 ];
a = fill(x,y,colour);
a.FaceAlpha = 0.5;
xlabel('time [s]')

Answer 1

[Walter Roberson]

It might be possible if you played around with FaceVertexCData and similar properties for long enough, but it would be easier if you were to change how you draw.

x = [1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8];
y = [0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0];
vertices = [x(:), y(:)];
faces = [
    1 2 3 4;
    5 6 7 8;
    9 10 11 12;
    13 14 15 16;
    ];
groups = [1 2 2 1];
cmap = parula(numel(unique(groups)));
colors = cmap(groups,:);
patch('vertices', vertices, 'Faces', faces, 'FaceColor', 'flat', 'FaceVertexCData', colors, 'CDataMapping', 'direct', 'FaceAlpha', 0.1);
xlabel('time [s]')