Tag
logistic-regression
- Apr 28, 2024 Newton and IRLS Fitting for Logistic Regression Why logistic regression is fitted by repeated weighted least squares, how the Hessian decides the step, and what happens when the weights collapse under separation. machine learning
- May 8, 2023 Logistic Regression as Conditional Bernoulli Likelihood How the sigmoid falls out of a log-odds parameterisation, why the negative log-likelihood is convex and unbounded in the separable case, and what the gradient actually computes. machine learning