\(\tilde{a} \overset{\Delta}{=} \vec{a} - \operatorname{avg}(\vec{a})\vec{1} = \mathbf{C}\vec{a}\)
Note that \(\mathbf{C}\) is the Centering matrix.
\(\tilde{a} \overset{\Delta}{=} \vec{a} - \operatorname{avg}(\vec{a})\vec{1} = \mathbf{C}\vec{a}\)
Note that \(\mathbf{C}\) is the Centering matrix.