RL Exploitation


**Regret** - Regret is a measure of your total mistake cost
 = the difference between your (expected) rewards, including youthful sub-optimal, and optimal (expected) rewards
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fd4b2e050-d2fa-4f35-9e28-c340b1576838%2FUntitled.png?table=block&id=703ab4f6-b2dc-4b5d-b184-5a2cf4aa8d8c&cache=v2)
> policy evaluation is prediction in policy iteration
> policy improvement is control in policy iteration





