# Regression

In *regression* problems, the label space `⚠ $\mathbf{Y}$`

is the set of real numbers, `⚠ $\mathbf{Y}=\mathbb{R}$`

(sometimes, a connected subset of `⚠ $\mathbb{R}$`

, such as `⚠ ${[0,\infty)}$`

or `⚠ ${[0,1]}$`

).
Allowed forecasts in such problems are elements of `⚠ $\mathbf{Y}$`

(we will have a probabilistic regression problem if we allow probability measures on `⚠ $\mathbf{Y}$`

as forecasts).