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Zahra Rajabi
pymdptoolbox
Commits
7fa677ca
Commit
7fa677ca
authored
Jan 20, 2013
by
Steven Cordwell
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docstring fixes
parent
40b39d86
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1
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9 deletions
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mdp.py
mdp.py
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mdp.py
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7fa677ca
...
...
@@ -526,7 +526,7 @@ class PolicyIteration(MDP):
#self.value = matrix(zeros((self.S, 1)))
else
:
if
(
len
(
initial_value
)
!=
self
.
S
):
raise
Typ
eError
(
"The initial value must be length S"
)
raise
Valu
eError
(
"The initial value must be length S"
)
self
.
value
=
matrix
(
initial_value
)
...
...
@@ -799,9 +799,9 @@ class ValueIteration(MDP):
Description
-----------
mdp
_value_i
teration applies the value iteration algorithm to solve
mdp
.ValueI
teration applies the value iteration algorithm to solve
discounted MDP. The algorithm consists in solving Bellman's equation
iteratively.
iteratively.
Iterating is stopped when an epsilon-optimal policy is found or after a
specified number (max_iter) of iterations.
This function uses verbose and silent modes. In verbose mode, the function
...
...
@@ -813,7 +813,6 @@ class ValueIteration(MDP):
Parameters
----------
P : transition matrix
P could be a numpy ndarray with 3 dimensions (AxSxS) or a
numpy ndarray of dytpe=object with 1 dimenion (1xA), each
...
...
@@ -836,12 +835,12 @@ class ValueIteration(MDP):
Data Attributes
---------------
value : value function
A vector which stores the optimal value function.
It exists only after
the iterate() method has been called
. Shape is (S, ).
A vector which stores the optimal value function.
Prior to calling the
iterate() method it has a value of None
. Shape is (S, ).
policy : epsilon-optimal policy
A vector which stores the optimal policy.
It exists only after
the iterate() method has been called
. Shape is (S, ).
iter : number of
done iterations
A vector which stores the optimal policy.
Prior to calling the
iterate() method it has a value of None
. Shape is (S, ).
iter : number of
iterations taken to complete the computation
An integer
time : used CPU time
A float
...
...
@@ -982,6 +981,10 @@ class ValueIteration(MDP):
def
iterate
(
self
):
"""
"""
if
self
.
verbose
:
print
(
' Iteration V_variation'
)
self
.
time
=
time
()
done
=
False
while
not
done
:
...
...
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