As known, the one-class SVM has one major parameter i.e. Nu. This parameter is bound within (0,1]. For the OCSVM kernels, we have the parameters:
1. RBF : Gamma
2. Sigmoid and Polynomial: Gamma and Coef0
So like the Nu parameter, is there any given range for these kernel parameters (specifically for OCSVM) or are they simply chosen at random?