Multiple lines for 1, 2 and 3 sigma on Profile Likelihood ratio plot


I have this profile likelihood ratio plot as shown in figure 1 below. And i want to draw 1, 2 and 3 sigma lines on it as shown in the figure 2. I am using ProfileLikelihoodCalculator.C file.

0 Figure 1

Figure 2

Could someone tell me how could one do that? Here is my code:


What is your problem ? finding the lines coordinates or drawing the lines ?

Drawing the lines. Now i am thinking i can only draw horizontal lines to show 2 and 3 sigma lines.

If you know the line coordinates simply use TLine to draw them.

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