How to change a section of the background color of plot?

Hi!

I have the following two plots:

The "in sight" plot is a binary array with as many elements as the "Elevation" and "Azimuth" arrays. I would like to change the background of the first plot, such that when the "in sight" variable is 0, the background is red, and when the "in sight" variable is 1, the background is green. I would look something like this:

Does anyone know a method to obtain such a figure? Thanks!

EDIT:

I've tried using patch, but that doesn't allow datetime inputs for the x-axis. Not sure how I would overcome that.

[Peter P]

Its an old question, but if anyone needs something similar, I hope this helps.

I had a vector Av which contained ones and zeros and I wanted to color the area that had ones with green, and the area with zeros as red in the background.

I borrowed the idea from Adam and made the following:

j=2;
x(1) = 1;
for i = 1:length(Av(:,1))-1
    if(Av(i,1) ~= Av(i+1,1))
        
        x(j) = i; j = j+1;
        
    end
end
i = length(x(1,:));
x(i+1) = length(Av(:,1));

for i = 2:length(x(1,:))
    
    hold on
    if(sum(Av(x(1,i-1):x(1,i),1)) <= 1)
        y = patch(x([i-1,i,i,i-1]), [0 0 30 30], 'red');
        y.FaceAlpha = 0.2; %make face a little transparent
        y.EdgeAlpha = 0; %make edge totally transparent
        
    else
        y = patch(x([i-1,i,i,i-1]), [0 0 30 30], 'green');
        y.FaceAlpha = 0.2; %make face a little transparent
        y.EdgeAlpha = 0; %make edge totally transparent
        
    end
end

Answer 1

[Adam Danz]

For datetime axes, you can use datenum() and datetick() as in the example below. This allows you to apply a patch object to the axes.

times = {'18:00', '18:30', '19:00', '19:30', '20:00', '20:30'};
dt = datetime(times, 'InputFormat', 'HH:mm', 'format', 'HH:mm'); %datetime format
x = datenum(dt);                                                 %numeric format
figure
patch(x([3,4,4,3]), [0 0 1 1], 'red')
xlim([min(x), max(x)])
ylim([0,1])
datetick('x', 'keeplimits')                                      %put axis labels back into datetime