Adding multiple patch items to a plot

Given an array for x axis 'start' indicies and a second array for x axis 'stop' indicies, how can I create shaded patches for the area between each start and stop index?

I tried to combine the two arrays into one matrix and combine with matching min,max y values but it doesnt seem to work well...

Example:

x_start = [43 123 238 374];
x_stop = [57 135 251 394];

% min and max values of the signal
ymin = -20; 
ymax = 20; 

I would like to create something like this python example I found:

[Ameer Hamza]

Can you give a small example of both indices and what is your required output?

[barbH]

Hi, I edited my question. I hope it makes things clearer..

Answer 1

[Adam Danz]

Here's a demo using the rectangel function.

% Create x and y values. 
y = rand(1,100); 
x = linspace(0,10,100);  % or x = 1:numel(y)
plot(x,y)
ylim([-1 2])

% Specify start, stop index values (positive integers)
startStopIdx = [        % [start, stop]
    10 25; 
    40 50; 
    80 92];

% Convert the index values to rectangle coordinates
yl = ylim(); 
ylim(yl) 
startStopX = x(startStopIdx); 
width = startStopX(:,2)-startStopX(:,1); 
hold on 
arrayfun(@(i)rectangle('Position', [startStopX(i,1),yl(1),width(i),range(yl)], ...
    'EdgeColor', 'none', 'FaceColor', [0 1 0 .2]), 1:size(startStopX,1))

[barbH]

Perfect! Thanks!

[Adam Danz]

Glad I could help.