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

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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.

Accepted Answer

Image Analyst
Image Analyst on 23 Apr 2015
How about using patch() or fill()? Or you can use area() if you plot the top curve first and they don't overlap any.

More Answers (2)

Image Analyst
Image Analyst on 24 Apr 2015
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]);
If this meets your needs, please mark it as Accepted. Thanks in advance.
  5 Comments
Image Analyst
Image Analyst on 18 May 2023
@Stefan Rather than hijack @HC's question (even though your question is related), could you please start your own new question?

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Amy Farris
Amy Farris on 13 Mar 2018
Thank you so much for this answer! It was very helpful to me!!!
  1 Comment
Image Analyst
Image Analyst on 14 Mar 2018
You're welcome. If it solved your problem, please mark it as Accepted. Thanks in advance.

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