HypoTestInverter Interval does not contain a root

[StephanH]

Hello,

@beojan

It appears the underlying issue is that CLs is set to -1 if CLb is 0.

This may be possible, but recently, there was a also report about a change in behaviour of the Brent root finder:

Program using GetX() working in root 5.34 but not root 6.18

Dear Colleagues, I need to invert a very complicated function (i.e. given y = f(x), I wish to find x = g(y)) and neither the inverse nor the function can be given analytically. I have written a simple test program (attached) that uses GetX() to invert an equation of the form y = exp(x). It appears to work in root version 5.34 but not version 6.18. Can anyone kindly explain what I have to do to make it work in version 6.18? shine.c (1.1 KB) Thanks in advance, R Please read tips for efficie…

@moneta knows RooStats much better than me, could you have a look?

Also:
Do you happen to know where the CLs is set to -1? Maybe it’s easy to fix.