Dynamic Policy Programming with Function Approximation

Mohammad Gheshlaghi Azar, Vicenç Gómez, Bert Kappen
Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics, PMLR 15:119-127, 2011.

Abstract

In this paper, we consider the problem of planning in the infinite-horizon discounted-reward Markov decision problems. We propose a novel iterative method, called dynamic policy programming (DPP), which updates the parametrized policy by a Bellman-like iteration. For discrete state-action case, we establish sup-norm loss bounds for the performance of the policy induced by DPP and prove that it asymptotically converges to the optimal policy. Then, we generalize our approach to large-scale (continuous) state-action problems using function approximation technique. We provide sup-norm performance-loss bounds for approximate DPP and compare these bounds with the standard results from approximate dynamic programming (ADP) showing that approximate DPP results in a tighter asymptotic bound than standard ADP methods. We also numerically compare the performance of DPP to other ADP and RL methods. We observe that approximate DPP asymptotically outperforms other methods on the mountain-car problem. [pdf][supplementary]

Cite this Paper


BibTeX
@InProceedings{pmlr-v15-azar11a, title = {Dynamic Policy Programming with Function Approximation}, author = {Azar, Mohammad Gheshlaghi and Gómez, Vicenç and Kappen, Bert}, booktitle = {Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics}, pages = {119--127}, year = {2011}, editor = {Gordon, Geoffrey and Dunson, David and Dudík, Miroslav}, volume = {15}, series = {Proceedings of Machine Learning Research}, address = {Fort Lauderdale, FL, USA}, month = {11--13 Apr}, publisher = {PMLR}, pdf = {http://proceedings.mlr.press/v15/azar11a/azar11a.pdf}, url = {https://proceedings.mlr.press/v15/azar11a.html}, abstract = {In this paper, we consider the problem of planning in the infinite-horizon discounted-reward Markov decision problems. We propose a novel iterative method, called dynamic policy programming (DPP), which updates the parametrized policy by a Bellman-like iteration. For discrete state-action case, we establish sup-norm loss bounds for the performance of the policy induced by DPP and prove that it asymptotically converges to the optimal policy. Then, we generalize our approach to large-scale (continuous) state-action problems using function approximation technique. We provide sup-norm performance-loss bounds for approximate DPP and compare these bounds with the standard results from approximate dynamic programming (ADP) showing that approximate DPP results in a tighter asymptotic bound than standard ADP methods. We also numerically compare the performance of DPP to other ADP and RL methods. We observe that approximate DPP asymptotically outperforms other methods on the mountain-car problem. [pdf][supplementary]} }
Endnote
%0 Conference Paper %T Dynamic Policy Programming with Function Approximation %A Mohammad Gheshlaghi Azar %A Vicenç Gómez %A Bert Kappen %B Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics %C Proceedings of Machine Learning Research %D 2011 %E Geoffrey Gordon %E David Dunson %E Miroslav Dudík %F pmlr-v15-azar11a %I PMLR %P 119--127 %U https://proceedings.mlr.press/v15/azar11a.html %V 15 %X In this paper, we consider the problem of planning in the infinite-horizon discounted-reward Markov decision problems. We propose a novel iterative method, called dynamic policy programming (DPP), which updates the parametrized policy by a Bellman-like iteration. For discrete state-action case, we establish sup-norm loss bounds for the performance of the policy induced by DPP and prove that it asymptotically converges to the optimal policy. Then, we generalize our approach to large-scale (continuous) state-action problems using function approximation technique. We provide sup-norm performance-loss bounds for approximate DPP and compare these bounds with the standard results from approximate dynamic programming (ADP) showing that approximate DPP results in a tighter asymptotic bound than standard ADP methods. We also numerically compare the performance of DPP to other ADP and RL methods. We observe that approximate DPP asymptotically outperforms other methods on the mountain-car problem. [pdf][supplementary]
RIS
TY - CPAPER TI - Dynamic Policy Programming with Function Approximation AU - Mohammad Gheshlaghi Azar AU - Vicenç Gómez AU - Bert Kappen BT - Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics DA - 2011/06/14 ED - Geoffrey Gordon ED - David Dunson ED - Miroslav Dudík ID - pmlr-v15-azar11a PB - PMLR DP - Proceedings of Machine Learning Research VL - 15 SP - 119 EP - 127 L1 - http://proceedings.mlr.press/v15/azar11a/azar11a.pdf UR - https://proceedings.mlr.press/v15/azar11a.html AB - In this paper, we consider the problem of planning in the infinite-horizon discounted-reward Markov decision problems. We propose a novel iterative method, called dynamic policy programming (DPP), which updates the parametrized policy by a Bellman-like iteration. For discrete state-action case, we establish sup-norm loss bounds for the performance of the policy induced by DPP and prove that it asymptotically converges to the optimal policy. Then, we generalize our approach to large-scale (continuous) state-action problems using function approximation technique. We provide sup-norm performance-loss bounds for approximate DPP and compare these bounds with the standard results from approximate dynamic programming (ADP) showing that approximate DPP results in a tighter asymptotic bound than standard ADP methods. We also numerically compare the performance of DPP to other ADP and RL methods. We observe that approximate DPP asymptotically outperforms other methods on the mountain-car problem. [pdf][supplementary] ER -
APA
Azar, M.G., Gómez, V. & Kappen, B.. (2011). Dynamic Policy Programming with Function Approximation. Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics, in Proceedings of Machine Learning Research 15:119-127 Available from https://proceedings.mlr.press/v15/azar11a.html.

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