Interagire con l'ambiente Frozen Lake

Ora esplorerai l'ambiente Frozen Lake, un mondo a griglia in cui le azioni spostano un agente in direzioni specifiche. Il tuo compito è osservare con attenzione l'ambiente e definire manualmente una lista di actions che porti l'agente dalla partenza (in alto a sinistra) all'obiettivo (in basso a destra) senza cadere in alcuna buca. Nell'ambiente Frozen Lake, le azioni sono tipicamente rappresentate come:

0: sinistra
1: giù
2: destra
3: su

Dopo aver eseguito il codice, ricordati di scorrere i grafici per vedere il percorso effettuato usando i pulsanti 'Previous Plot' e 'Next Plot'. Questo ti aiuterà a capire la sequenza delle azioni e i relativi risultati.

gym e plt sono stati importati insieme alla funzione render() e alla variabile env.

Questo esercizio fa parte del corso

Reinforcement Learning con Gymnasium in Python

Visualizza il corso

Istruzioni dell'esercizio

Osserva la posizione dell'agente a destra e definisci una lista di actions per guidarlo attraverso il lago fino all'obiettivo.
Esegui ciascuna azione nella lista tramite il ciclo for.
Renderizza l'ambiente dopo ogni azione per osservare il percorso dell'agente.

Esercizio pratico interattivo

Prova a risolvere questo esercizio completando il codice di esempio.

# Define the sequence of actions
actions = [____]

for action in actions:
  # Execute each action
  state, reward, terminated, _, _ = ____
  # Render the environment
  ____
  if terminated:
  	print("You reached the goal!")

Modifica ed esegui il codice

Questo esercizio fa parte del corso

Reinforcement Learning con Gymnasium in Python

AvançadoNível de habilidade

4.8+

Inizia il corso gratis

Dive into the exciting world of Reinforcement Learning (RL) by exploring its foundational concepts, roles, and applications. Navigate through the RL framework, uncovering the agent-environment interaction. You'll also learn how to use the Gymnasium library to create environments, visualize states, and perform actions, thus gaining a practical foundation in RL concepts and applications.

Exercise 1: Fondamenti del reinforcement learning Exercise 2: Che cos'è il Reinforcement Learning?Exercise 3: RL vs. altri sotto-domini di ML Exercise 4: Scenari per applicare l'RL Exercise 5: Orientarsi nel framework RL Exercise 6: Ciclo di interazione RL Exercise 7: Compiti di RL episodici e continui Exercise 8: Calcolare i ritorni scontati per le strategie dell'agente Exercise 9: Interagire con gli ambienti di Gymnasium Exercise 10: Configurare un ambiente Mountain Car Exercise 11: Visualizzare l'ambiente Mountain Car Exercise 12: Interagire con l'ambiente Frozen Lake

Esercizio in corso

Delve deeper into the world of RL focusing on model-based learning. Unravel the complexities of Markov Decision Processes (MDPs), understanding their essential components. Enhance your skill set by learning about policies and value functions. Gain expertise in policy optimization with policy iteration and value Iteration techniques.

Exercise 1: Markov Decision Processes Exercise 2: Custom Frozen Lake MDP components Exercise 3: Exploring state and action spaces Exercise 4: Transition probabilities and rewards Exercise 5: Policies and state-value functions Exercise 6: Defining a deterministic policy Exercise 7: Computing state-values for a policy Exercise 8: Comparing policies Exercise 9: Action-value functions Exercise 10: Computing Q-values Exercise 11: Improving a policy Exercise 12: Policy iteration and value iteration Exercise 13: Applying policy iteration for optimal policy Exercise 14: Implementing value iteration

Embark on a journey through the dynamic realm of Model-Free Learning in RL. Get introduced to to the foundational Monte Carlo methods, and apply first-visit and every-visit Monte Carlo prediction algorithms. Transition into the world of Temporal Difference Learning, exploring the SARSA algorithm. Finally, dive into the depths of Q-Learning, and analyze its convergence in challenging environments.

Exercise 1: Monte Carlo methods Exercise 2: Episode generation for Monte Carlo methods Exercise 3: Implementing first-visit Monte Carlo Exercise 4: Implementing every-visit Monte Carlo Exercise 5: Temporal difference learning Exercise 6: Implementing the SARSA update rule Exercise 7: Solving 8x8 Frozen Lake with SARSA Exercise 8: Q-learning Exercise 9: Implementing Q-learning update rule Exercise 10: Solving 8x8 Frozen Lake with Q-learning Exercise 11: Evaluating policy on a slippery Frozen Lake

Dive into advanced strategies in Model-Free RL, focusing on enhancing decision-making algorithms. Learn about Expected SARSA for more accurate policy updates and Double Q-learning to mitigate overestimation bias. Explore the Exploration-Exploitation Tradeoff, mastering epsilon-greedy and epsilon-decay strategies for optimal action selection. Tackle the Multi-Armed Bandit Problem, applying strategies to solve decision-making challenges under uncertainty.

Exercise 1: Expected SARSA Exercise 2: Expected SARSA update rule Exercise 3: Applying Expected SARSA Exercise 4: Double Q-learning Exercise 5: Implementing double Q-learning update rule Exercise 6: Applying double Q-learning Exercise 7: Balancing exploration and exploitation Exercise 8: Defining epsilon-greedy function Exercise 9: Solving CliffWalking with epsilon greedy strategy Exercise 10: Solving CliffWalking with decayed epsilon-greedy strategy Exercise 11: Multi-armed bandits Exercise 12: Creating a multi-armed bandit Exercise 13: Solving a multi-armed bandit Exercise 14: Assessing convergence in a multi-armed bandit Exercise 15: Congratulations!