Accumulating Eligibility Trace

2000년 도입 · 논문 15편에서 사용

An Accumulating Eligibility Trace is a type of eligibility trace where the trace increments in an accumulative way. For the memory vector $\textbf{e}\_{t} \in \mathbb{R}^{b} \geq \textbf{0}$: $$\mathbf{e\_{0}} = \textbf{0}$$ $$\textbf{e}\_{t} = \nabla{\hat{v}}\left(S\_{t}, \mathbf{\theta}\_{t}\right) + \gamma\lambda\textbf{e}\_{t}$$