MATLAB: How fill color for base load, peak load, intermediate load

fill colorplot area

My data is with x axis date time, and y axis power in watt. They are data points.
I want to fill color for base load, peak load, intermediate load. Base load area should be from y=0 to y=3, and intermediate load is from y=3 to y=9, peak load is from y=9 to upper y value. I have tried the code below. But the green part is wrong. green part should be on the left and below blue part.
figure(1);
plot(myDatetime,PSummesplit,'b')
hold on;
le1=3.12;
le2=9;
area(myDatetime,max(PSummesplit, le1),le1,'EdgeColor','none','FaceColor',[0 0.25 0.25])
area(myDatetime,max(PSummesplit, le2),le2,'EdgeColor','none','FaceColor',[0 0.25 0.5])
How should I fix this? Can anyone help me out please? Thank you for your time!

Best Answer

Hi,
The issue is that the base value of the first area is changing when the second area is displayed when using area() function.
Try implementing the below code which involves fill() function
Hope it works!
https://www.mathworks.com/help/matlab/ref/fill.html
 f1=PSummesplit>=1e1;                              
 b1=1e1*ones(size(myDatetime(f1));
 f2=PSummesplit>=1e2;
 b2=1e2*ones(size(myDatetime(f2));
 ph=funcfill(x(f),y(f),b2,[0 0.25 0.25] ,'none');
 hold on;
 ph=funcfill(x(f2),y(f2),b3,[0 0.25 0.5],'none');
 
 
 
 function fillhandle=funcfill(xpoints,upper,lower,color,edge)    %xpoints refer xvalues, upper corresponds to upper curve values,
                                                                 % lower corresponds to lower curve values
    filled=[upper,fliplr(lower)];
    xpoints=[xpoints,fliplr(xpoints)];
    fillhandle=fill(xpoints,filled,color);
    set(fillhandle,'EdgeColor',edge,'FaceColor',color);
end
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