Need suggestion on how to highlight the 2D histogram plot after cut condition

[dastudillo]

An alternative method:

TGraph2D contour with exclusion band

Dear experts, I have a TGraph2D drawn in cont4z option. Then I want to superimpose another TGraph2D on the same pad to use one of its contours as the exclusion limit for the first plot. I know how to put them on two pads, making the second pad transparent and so on. However, The second TGraph2D is a complicated 2D graph. I have limited the number of contours to 2 by doing g->GetHistogram()->SetContour(2) to get the first contour. This is fine and it works by showing only one contour superim…

You can get a contour plot with the CONT option.