[R] QUADRATIC TREND FOR THE PARAMETERS OF A NON-STATIONARY GEV

Hi there, I am a new user to R. Could anyone explain me how to define the quadratic trends for the parameter mu/sigma/shi, when fitting non-stationary GEV distributions? That is the mu/sigma/shi has a quadratic trends as follows: mu(t)=beta0+beta1*t+beta2*t^2 sigma(t)=alpha0+alpha1*t+alpha2*t

[R] QUADRATIC LINK FUNCTIONS FOR MLE ESTIMATE OF NON-STATIONARY GEV FITS

Hi All, I am a newcomer to S/R. Could you please let me know how to model quadratic trends for the mul/sigl link functions when fitting non-stationary GEV distributions using the ismev package? Thanks Best Regards, Mohammad Ashrafuz Zaman PhD Candidate School of Engineering Building XC, Room 1.