I try to solve a navigation problem with PPO; my actions space have three-part:
- robot linear velocity that is in [-3,3] range (getting from a tanh activation func)
- robot linear angular that is in [-pi/6, pi/6] range (getting from a tanh activation func)
- robot step-time duration that is from [0.2, 0.5, 0.8] (getting from a softmax activation func)
The problem that I face is how to calculate the ratio of probability from this separate disturbing? Mean or sum? or was there another way to calculate log_prob from different distributions? Something like log_prob from multivariable distribution!