The aim here is for the robot to learn how to move round its environment avoiding walls.
The robot has four built in instincts : go forward, turn right, turn left or go back.
There is a probability of choosing a particular action: initially all are equally possible.
The robot decides which of four states it is in, and then chooses one of four actions.
If a chosen action is good, its probability is increased, otherwise it is decreased.
The figures show the probabilities of choosing each action in each state.
Click on the screen to reposition robot - if it gets stuck.
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