def pIteration(world, userMap, maxX, maxY, discount=0.99, MAX_ITERATIONS=100):
gen = BasicGridWorld(userMap, maxX, maxY)
domain = gen.generateDomain()
initialState = gen.getExampleState(domain);
rf = BasicRewardFunction(maxX, maxY, userMap)
tf = BasicTerminalFunction(maxX, maxY)
env = SimulatedEnvironment(domain, rf, tf, initialState)
visualizeInitialGridWorld(domain, gen, env)
hashingFactory = SimpleHashableStateFactory()
timing = defaultdict(list)
rewards = defaultdict(list)
steps = defaultdict(list)
convergence = defaultdict(list)
policy_converged = defaultdict(list)
last_policy = defaultdict(list)
allStates = getAllStates(domain, rf, tf, initialState)
print("*** {} Policy Iteration Analysis".format(world))
MAX_ITERATIONS = MAX_ITERATIONS
iterations = range(1, MAX_ITERATIONS + 1)
pi = PolicyIteration(domain,rf,tf,discount,hashingFactory,-1,1,1);
pi.setDebugCode(0)
for nIter in iterations:
startTime = clock()
#pi = PolicyIteration(domain,rf,tf,discount,hashingFactory,-1,1, nIter);
#pi.setDebugCode(0)
# run planning from our initial state
p = pi.planFromState(initialState);
endTime = clock()
timing['Policy'].append((endTime-startTime)*1000)
convergence['Policy'].append(pi.lastPIDelta)
# evaluate the policy with one roll out visualize the trajectory
runEvals(initialState, p, rewards['Policy'], steps['Policy'], rf, tf, evalTrials=1)
if nIter == 1 or nIter == 50:
simpleValueFunctionVis(pi, p, initialState, domain, hashingFactory, "Policy Iteration{}".format(nIter))
policy = pi.getComputedPolicy()
allStates = pi.getAllStates()
current_policy = [[(action.ga, action.pSelection)
for action in policy.getActionDistributionForState(state)]
for state in allStates]
policy_converged['Policy'].append(current_policy == last_policy)
last_policy = current_policy
simpleValueFunctionVis(pi, p, initialState, domain, hashingFactory, "Policy Iteration{}".format(nIter))
dumpPolicyMap(MapPrinter.printPolicyMap(allStates, p, gen.getMap()),
world + ' Policy Iteration Policy Map.pkl')
dumpCSVp(iterations, timing['Policy'], rewards['Policy'], steps['Policy'],convergence['Policy'],
world, 'Policy', policy_converged['Policy'])
simpleValueFunctionVis(vi, p, initialState, domain, hashingFactory,
"Value Iteration {}".format(nIter))
dumpCSV(nIter, timing['Value'][1:], rewards['Value'], steps['Value'],
convergence['Value'], world, 'Value')
pi = PolicyIteration(domain, rf, tf, discount, hashingFactory, 1e-3, 10, 1)
pi.toggleUseCachedTransitionDynamics(False)
print "//{} Policy Iteration Analysis//".format(world)
flag = True
timing['Policy'].append(0)
for nIter in iterations:
startTime = clock()
p = pi.planFromState(initialState)
#timing['Policy'].append((clock()-startTime) * 1000)
timing['Policy'].append(timing['Policy'][-1] + clock() - startTime)
policy = pi.getComputedPolicy()
current_policy = {
state: policy.getAction(state).toString()
for state in allStates
}
convergence['Policy2'].append(pi.lastPIDelta)
if nIter == 1:
convergence['Policy'].append(999)
else:
convergence['Policy'].append(
comparePolicies(last_policy, current_policy))
last_policy = current_policy
runEvals(initialState, p, rewards['Policy'], steps['Policy'])
#if (nIter == 1):
#simpleValueFunctionVis(pi, p, initialState, domain, hashingFactory, "Policy Iteration{}".format(nIter))
if (convergence['Policy2'][-1] < 1e-6) and flag: