How to shade time intervall

I would like to shade specific time ranges(intervalls) which are created from a datamatrix in a for loop according to there indexes. I have the datetimes (begin and end of the intervall)

the Face (should be alpha = 0.2) and the y axis could be the whole plot domain or even better +- a certain mean value which I have as well.

goal is to have 5 different patches/areas on my timeseries

patch doesn't support datetime

fill/area etc. I couldn't find any satisfying solution

figure('DefaultAxesFontSize',15);                                         
x = date;
y = CAL.stick_Data.stick_duty_cps;       
k = 1;                                                                              % placeholder in loop plot for row of CalibrationA(:,1)
idx=1;
for m= Markeridx'
        hold all;
        plot(x(:,k),y(:,m));
        set(gca,'TickLabelInterpreter','latex') 
        set(gcf,'units','points','position',[100,100,700,500])    % figure position on screen and size is the saved figuresize!
        caption = sprintf('y = %f * x + %f', p(1), p(2));
        text(xt, yt, caption, 'FontSize', 12, 'Color', 'k', 'FontWeight', 'bold','interpreter','latex');
        xlabel('ppbv  ','interpreter','latex');                               %FC_cal/FC_zeroair *1000
        ylabel('cps','interpreter','latex'); 
        idx = idx+1;
end
legend({'21.02264', '33.03350', '39.03321', '42.03382',...
    '45.03350', '59.04914', '63.02629', '69.06988', '73.06480',...
    '78.04640', '79.05422', '81.06988', '87.08045', '93.06988',...
    '107.08553', '121.10118', '135.11683', '137.13248', '203.94361',...
    '330.84809'})
a = axes;
t1 = title('Gas calibration dilution steps from subset A','interpreter','latex');  % Make sure to change titel after changing susbets
a.Visible = 'off';                                                                  % set(a,'Visible','off');
t1.Visible = 'on';                                                                 % set(t1,'Visible','on');
filter(1) = area([datetime(CALtime(1,3)) datetime(CALtime(1,end))  datetime(CALtime(1,end)) datetime(CALtime(1,3))],'FaceColor','r','Edgecolor','none', 'FaceAlpha',.3);
hold off;

Here is my figure without the shaded areas

Answer 1

[Star Strider]

Try this:

time = datetime('17:00','InputFormat','HH:mm'):minutes(1):datetime('18:00','InputFormat','HH:mm');                                                                              % Create Vector
time.Format = 'HH:mm';
cps = randn(1, numel(time))*0.1 + sin(2*pi*(0:numel(time)-1)/45);                                                                                                               % Create Vector

fillfcn = @(timerange,colour,lo,hi) fill([time(timerange) fliplr(time(timerange))], [ones(size(time(timerange)))*lo ones(size(time(timerange)))*hi], colour, 'FaceAlpha',0.2);  % Function Ot Create ‘fill’ Regions

figure
plot(time, cps)
hold on
fillfcn((10:20), 'r', 0.5, 1.2)
fillfcn((30:50), 'g', -1.3, -0.7)
hold off

With the test code, it produces:

Experiment to get the result you want.