CHEN Xingguo, GAO Yang, FAN Shunguo. Temporal Difference Learning with Piecewise Linear Basis[J]. Chinese Journal of Electronics, 2014, 23(1): 49-54.
Citation: CHEN Xingguo, GAO Yang, FAN Shunguo. Temporal Difference Learning with Piecewise Linear Basis[J]. Chinese Journal of Electronics, 2014, 23(1): 49-54.

Temporal Difference Learning with Piecewise Linear Basis

Funds:  This work is supported in part by the National Science Foundation of China (No.61035003, No.61175042, No.60721002), the National 973 Program of China (No.2009CB320702), the 973 Program of Jiangsu, China (No.BK2011005), and Program for New Century Excellent Talents in University (No.NCET-10-0476).
  • Received Date: 2012-12-01
  • Rev Recd Date: 2013-01-01
  • Publish Date: 2014-01-05
  • Temporal difference (TD) learning family tries to learn a least-squares solution of an approximate Linear value function (LVF) to deal with large scale and/or continuous reinforcement learning problems. However, due to the represented ability of the features in LVF, the predictive error of the learned LVF is bounded by the residual between the optimal value function and the projected optimal value function. In this paper, Temporal difference learning with Piecewise linear basis (PLB-TD) is proposed to further decrease the error bounds. In PLBTD, there are two steps: (1) build the piecewise linear basis for problems with different dimensions; (2) learn the parameters via some famous members from the TD learning family (linear TD, GTD, GTD2 or TDC), which complexity is O(n). The error bounds are proved to decrease to zero when the size of the piecewise basis goes into infinite. The empirical results demonstrate the effectiveness of the proposed algorithm.
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