From 4b8bd673ff44319c7f2d955e07937b2fed805326 Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@windfisch.org>
Date: Tue, 5 Jan 2016 16:59:27 +0100
Subject: cleanup

---
 sol.py | 58 ++++++++--------------------------------------------------
 1 file changed, 8 insertions(+), 50 deletions(-)

diff --git a/sol.py b/sol.py
index f98421d..7e3a0d4 100644
--- a/sol.py
+++ b/sol.py
@@ -10,9 +10,7 @@ maze = [ [0, 0, 0, 0, 0, 0, 0],
          [0, 0, 0, 0, 0, 1, 2] ]
 
 start=(1,1)
-theta = None
-theta_1 = 0.00001
-theta_2 = 0.01
+theta = 0.01
 gamma=0.9 # discount
 epsilon = 0.1
 epsilon_reduction = 1
@@ -53,8 +51,8 @@ if arg['-h']:
     print("       MODE:  -1 / --policy-evaluation or\n" +
           "              -2 / --q-learning\n" +
           "       OPTIONS: --theta NUM     # convergence threshold\n" +
-          "                                # default: %f / %f for -1 / -2\n" % (theta_1, theta_2) +
-          "                --gamma NUM     # learning discount for value iteration\n" +
+          "                                # default: %f\n" % theta +
+          "                --gamma NUM     # learning discount\n" +
           "                                # default: %f\n" % gamma +
           "                --alpha NUM     # learning rate for q-learning\n" +
           "                                # default: %f\n" % alpha +
@@ -78,7 +76,7 @@ if arg['-q'] or arg['--quiet']:
     visu = False
 
 if arg['--theta']:
-    theta = theta_1 = theta_2 = float(arg['--theta'])
+    theta = float(arg['--theta'])
 
 if arg['--gamma']:
     gamma = float(arg['--gamma'])
@@ -113,13 +111,6 @@ dir_coords = [(0,-1), (1,0), (0,1), (-1,0)]
 def argmax(l):
     return max(range(len(l)), key=lambda i:l[i])
 
-def merge_dicts(dicts):
-    result = defaultdict(lambda:0.)
-    for factor, d in dicts:
-        for k in d:
-            result[k] += factor * d[k]
-    return result
-
 def draw_randomly(d):
     c = 0.
     rnd = random()
@@ -128,34 +119,7 @@ def draw_randomly(d):
         if rnd < c:
             return k
 
-def visualize(maze, P):
-    n=0
-    for y in range(len(maze)):
-        line1=""
-        line2=""
-        line3=""
-        for x in range(len(maze[0])):
-            if maze[y][x] == 1:
-                line1 += "@" * (2+7)
-                line3 += "@" * (2+7)
-                line2 += "@@@%03.1f@@@" % P[y][x]
-            elif maze[y][x] == 2:
-                line1 += "." * (2+7)
-                line3 += "." * (2+7)
-                line2 += ".%07.5f." % P[y][x]
-            else:
-                line1 += "'" + " " * (7) + " "
-                line3 += " " + " " * (7) + " "
-                line2 += " %07.5f " % P[y][x]
-        print(line1)
-        print(line3)
-        print(line2)
-        print(line3)
-        print(line3)
-        n+=5
-    return n
-
-def visualize2(maze, Q):
+def visualize(maze, Q):
     n=0
     for y in range(len(maze)):
         line1=""
@@ -229,10 +193,6 @@ class World:
         return self.R((x,y),ss, None), ss
 
 
-    def P(self, s, ss, pi):
-        return merge_dicts([(pi[d], self.action(s[0],s[1], d)) for d in directions])[ss]
-
-
     def R(self, s, ss, pi):
         if s!=ss and self.maze[ss[1]][ss[0]] == 2: # goal
             return 10.0
@@ -242,8 +202,6 @@ class World:
     def is_final(self,s):
         return self.maze[s[1]][s[0]] == 2
 
-theta = theta_2
-
 a = World(maze, start)
 Q = [ [ [0. for k in range(4)] for i in range(a.xlen) ] for j in range(a.ylen) ]
 
@@ -277,7 +235,7 @@ for i in range(1000000):
         print("iteration %.3d, alpha=%.3e, epsilon=%.3e maxdiff=%.7f"%(i,alpha,epsilon,maxdiff))
         n = 0
         if visu:
-            n = visualize2(maze,Q)
+            n = visualize(maze,Q)
         cursor_up(n+2)
 
     if (logfile != None):
@@ -301,9 +259,9 @@ for i in range(1000000):
         if stopstate == 0:
             break
     else:
-        stopstate = 100
+        stopstate = 1000
 
 print("finished after %.3d iterations, alpha=%.3e, epsilon=%.3e"%(i,alpha,epsilon))
-visualize2(maze,Q)
+visualize(maze,Q)
 if logfile != None:
     logfile.close()
-- 
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