Skip to content

Glossary: Probability for ML

Sigmoid

Also written: logistic function, expit

The function 1 ÷ (1 + e^(−s)) that turns a score into a probability between 0 and 1. It is softmax for two classes and is computed by `scipy.special.expit`.

Where the book teaches it

Related terms

SoftmaxLogit (score)Log-odds