Evaluating the cost function

The general cost function of ensemble learning, as given in Equation (3.11), is

$$\begin{split}C(\boldsymbol{M}, \boldsymbol{\theta}) &= C_q + ... ...mbol{\theta}) - \log p(\boldsymbol{\theta}) \right] \end{split}$$ (6.1)

where all the expectations are taken over $q(\boldsymbol{M}, \boldsymbol{\theta})$. This will be true for all the similar formulas in this section unless explicitly stated otherwise.