What is the best way to fill the areas between lines in a graph?

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HC 2015-4-23

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评论： Stefan 2023-5-18

I have to plot a the wave patterns in a nozzle and I want to highlight the changes with filling the areas between the lines with color but I can't find a way to do this.

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Image Analyst 2015-4-23

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How about using patch() or fill()? Or you can use area() if you plot the top curve first and they don't overlap any.

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Image Analyst 2015-4-24

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HC, I haven't heard from you so I guess you must be having trouble. Here is a demo:

curve1 = 10 + randi(2, 1, 20);
curve2 = 1 + randi(2, 1, 20);
% Find area coordinates.
inBetweenRegionX = [1:length(curve1), length(curve2):-1:1]
inBetweenRegionY = [curve1, fliplr(curve2)];
% Display the area first so it will be in the background.
fill(inBetweenRegionX, inBetweenRegionY, 'g');
hold on;
% Now plot the curves and markers on top of the area.
plot(curve1, 'rd-', 'LineWidth', 3);
plot(curve2, 'bs-', 'LineWidth', 3);
grid on;
ylim([0,13]);