Design Matrix

#Math

$$\displaystyle \boldsymbol{X}=\begin{pmatrix}

\boldsymbol{x}{1}^{^{\top}} \\\vdots \\\boldsymbol{x}{N}^{^{\top}}
\end{pmatrix}\in \mathbb{R}^{N\times (D+1)}$$

• A matrix representing $\displaystyle N$ samples each with $\displaystyle D$ features and one extra bias term