
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Transcribed Image Text:Computing theta update rule
possible (graded)
The Q-learning approximation algorithm starts with an initial parameter estimate of 0. As the tabular Q-learning, upon observing a data tuple
(s, c, R (s, c), s'), the target value y for the Q-value of (s, c) is defined as the sampled version of the Bellman operator,
Then the parameter is simply updated by taking a gradient step with respect to the squared loss
y = = R(s, c) + ymax Q (s', c', 0).
L(0) =
The negative gradient can be computed as follows:
(Enter your answer in terms of y, Q(s, c, theta), and phi(s, c).).
g (0) =
=
L (0) = 1/2 (y — Q (s, c, 0))².
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