Q-function


In Reinforcement Learning, Q-function is a mathematical function that determines the expected utility of taking a particular action in a given state and following a particular policy thereafter. It maps a state-action pair to a real number representing the expected cumulative reward obtained by taking that action in that state and following the policy thereafter. The Q-function is used to determine the optimal policy for an agent to take in a given environment. The optimal policy is the one that maximizes the expected cumulative reward over time. Q-learning is a popular algorithm used to learn the Q-function in a model-free manner, i.e., without requiring a model of the environment. The Q-function is often represented as a table or a neural network.


Your Previous Searches
Random Picks

  • Complex Models: Complex models refer to machine learning models that have a large number of parameters and require significant computational resources to train. These models are often used in tasks such as image and speech recognition, natural language pro ... Read More >>
  • Historical Data: Historical data refers to the data that has been collected in the past and stored for future reference. In the context of data science and artificial intelligence, historical data is used to train machine learning models and make prediction ... Read More >>
  • Left-censoring: Left-censoring is a statistical method used in data analysis to handle incomplete data where the values below a certain threshold are not observed or recorded. In other words, left-censoring occurs when the data is truncated from below, mea ... Read More >>
Top News

Employees were already freaked out about AI — Amazon just proved them right...

Amazon CEO Andy Jassy acknowledged in a Tuesday statement what many workers have been scared of: Artificial intelligence will soon mean job cuts....

News Source: Business Insider on 2025-06-18

Trump’s purges come for the U.S.’ nuclear safety board...

Donald Trump’s efforts to strip federal agencies and commissions of their independence took an alarming step Monday, when the president fired one of the five commissioners who sit on the Nuclear Reg...

News Source: MSNBC on 2025-06-17

Amazon says it will reduce its workforce as AI replaces human employees | CNN Bu...

Amazon says it will reduce its workforce as AI replaces human employees | CNN Businesscnn.com...

News Source: CNN on 2025-06-17

Amazon’s Jassy says AI will reduce company’s corporate ranks...

Andy Jassy expects the company’s workforce to decline in the next few years....

News Source: Fortune on 2025-06-17

Bank of America is bullish on these 4 under-the-radar AI stocks...

Investors interested in the AI trade beyond the Magnificent Seven should look into these four stocks with breakout growth potential....

News Source: Business Insider on 2025-06-17