Let $ X \in\mathbb{R}^{n \times d}$ be the matrix data and $Y \in\mathbb{R}^{n}$ be the labels vector associated to the matrix $X$, where for each $i$, $\textbf{x}_i \in\cal{X}\subseteq\mathbb{R}^d$ and $y_i \in{\cal Y}\subseteq\mathbb{R}$. \\
Let $ X \in\mathbb{R}^{n \times d}$ be the matrix data and $Y \in\mathbb{R}^{n}$ be the labels vector associated to the matrix $X$, where for each $i$, $\textbf{x}_i \in\cal{X}\subseteq\mathbb{R}^d$ and $y_i \in{\cal Y}\subseteq\mathbb{R}$. \\
