Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [policy-gradients]

The tag has no usage guidance.

0
votes
0answers
8 views

How to include exploration in Gaussian policy

When dealing with continuous action spaces, a common choice when designing a policy in policy gradient methods is to learn mean and variance of actions for a specific state and then simply sample from ...
1
vote
0answers
9 views

Impact of Varying Length Trajectories on Policy Gradient Optimization

As the question states, I am wondering how, if at all, a varying length of a trajectory (series of state,action pairs) will impact training/performance of policy gradient algorithms such as PPO, TRPO ...
0
votes
1answer
30 views

Can gradient descent training be used for nonsmooth loss functions?

I have non-smooth loss function - e.g. loss(x)=min(x, 0.5). Can gradient descent be used for training neural networks with such functions. Can gradient descent be used for fairly general, ...
-1
votes
0answers
18 views

Is it possible to solve MountainCar with policy gradient?

Are there any way to solve mountain car RL problem with policy gradient? It seems that it's quite hard to solve it in this way due to the fact that feedback is given only in case the car gets out of ...
1
vote
0answers
23 views

Why does the “reward to go” trick in policy gradient methods work?

In policy gradient method, there's a trick to reduce a variance of policy gradient. We use causality, and remove part of the sum over rewards so that only actions happened after the reward are taken ...