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I have a matlab plot that looks like this: Where the Y values for each of the subplots are stored in single dimensional arrays. What i would like to do is to find an area where the top graph is above a certain height say 0.5. I would also like to highlight the same area in the other graphs as well. Here is an example of what I am talking about: The best i have been able to find so far is the function area which will fill an area on the matlab grid. However, if someone could tell me how to make it transparent and also how to fill multiple areas without having to do lots of area commands that would be great. Otherwise I can identify a group of areas in a struct and use a for loop to plot them. Here is some psuedo code of the way i would do it: countstruct = 1; for i = 1:length(yValue) if (yValue(i) > 1) outside = [outside, i] else areas(countstruct).outside = outside; countstruct = countstruct + 1; clear outside; end end Then to plot the areas i would do this: for i = 1:length(areas) area(areas(i).outside, ones(length(area), 1)*14, "SomeThingToMakeItTransperant') end and i would do this for each of the subplots. Obviously this is quite convoluted so it would be better to have a one liner. Can anyone think of one?

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