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).