Extract data from plot, with specific x and y points?

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Sharif Khalil
Sharif Khalil 2018-8-17
评论： Sharif Khalil 2018-8-17
Hi, I would like to extract the intensity values of a figure for specific x and y points representing the blue circle in the plot below. I know the x and y points, I want to extract the values representing the colors.
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Aquatris
Aquatris 2018-8-17
If you made this graph yourself, you should have a matrix, Z, used in creating the colored map;
contourf(X,Y,Z)
If so, you should be able to get the color values using
colorValue = Z(xIndex,yIndex)

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