NLP, Machine Learning, Deep Learning, Artificial Intelligence, AI.
probabilities for this sequence. We start by setting the backward probability of each state at the final time step to 1. So, β[‘Rainy’, 3] = β[‘Sunny’, 3] = 1. Recursion: For each preceding time step t (from T−1 to 1), we calculate the backward probability of each state i. This is done by summing