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Minor fixes #234

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Minor fixes #234

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4 changes: 2 additions & 2 deletions MC/MC Prediction Solution.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -92,9 +92,9 @@
" states_in_episode = set([tuple(x[0]) for x in episode])\n",
" for state in states_in_episode:\n",
" # Find the first occurance of the state in the episode\n",
" first_occurence_idx = next(i for i,x in enumerate(episode) if x[0] == state)\n",
" first_occurence_idx = [i for i,x in enumerate(episode) if x[0] == state]\n",
" # Sum up all rewards since the first occurance\n",
" G = sum([x[2]*(discount_factor**i) for i,x in enumerate(episode[first_occurence_idx:])])\n",
" G = sum([x[2]*(discount_factor**i) for i,x in enumerate(episode[first_occurence_idx[0]:])])\n",
" # Calculate average return for this state over all sampled episodes\n",
" returns_sum[state] += G\n",
" returns_count[state] += 1.0\n",
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