5
State Machines
5.1 Representing the Environment by Feature Vectors
The feature vector used by an S-R agent can be thought of as representing the state of the environment so far as that agent is concerned. From this feature vector, the S-R agent computes an action appropriate for that environmental state. As I have mentioned, sensory limitations of the agent preclude completely accurate representation of environmental state by feature vectors—especially feature vectors that are computed from immediate sensory stimuli. The accuracy can be improved, however, by taking into account previous sensory history. Important aspects of the environment that cannot be sensed at the moment might have been sensed before. Suppose the agent does have an initial ...
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