I am applying Gaussian process model to my data set. But wondering what are the mathematical meanings of this -2LL (-2*LogLikelihood) term? Is there any formula for this (literature)?
I have searched in literature, I only found negative logLikelihood instead of -2*LL. Why JMP take twice of negative?
![JMPqq.PNG JMPqq.PNG](https://community.jmp.com/t5/image/serverpage/image-id/24436iC44A85F278D6025A/image-size/medium?v=v2&px=400)