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How to add two vertical lines to plot and color between them?

Asked by Patrick on 4 May 2013


I want to highlight a period in my plot by adding two vertical lines and coloring between them. Any ideas on how to do that?




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1 Answer

Answer by the cyclist on 4 May 2013
Accepted answer

Here's one way:

%Plot something
% Add lines
h1 = line([2 2],[1 10]);
h2 = line([5 5],[1 10]);
% Set properties of lines
set([h1 h2],'Color','k','LineWidth',2)
% Add a patch
patch([2 5 5 2],[1 1 10 10],'r')
% The order of the "children" of the plot determines which one appears on top.
% I need to flip it here.


Patrick on 5 May 2013


Patrick on 5 May 2013

Just one more question: instead of using the color 'r' (red), how can I use a light gray color? In fact my graph has three different patches, so I wanted to use different shades of gray...


the cyclist on 5 May 2013

You can encode an RGB value, by replacing 'r' with an RGB vector with values between 0 and 1.

gray = [0.4 0.4 0.4];
patch([2 5 5 2],[1 1 10 10],gray)
the cyclist

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