Formula

Maximum Likelihood Cost Function for Conditional Distributions

The maximum likelihood cost function for learning conditional distributions is defined as the expected negative log-likelihood: J(θ)=Ex,yp^datalogpmodel(yx)J(\theta) = -\mathbb{E}_{x, y \sim \hat{p}_{data}} \log p_{model}(y \mid x). The specific form of this cost function changes depending on the choice of model, specifically the form of logpmodel\log p_{model}. An advantage of this approach is that it removes the burden of manually designing cost functions for each specific model, as the objective is automatically determined once the conditional probability distribution is specified.

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Updated 2026-07-04

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Data Science