pyOMA.core.VarSSIRef.vectorize# pyOMA.core.VarSSIRef.vectorize(matrix)[source]# \[A=\begin{bmatrix} 1 & 2 & 3 \ 4 & 5 & 6 \ 7 & 8 & 9 \ \end{bmatrix}\] returns vertically stacked columns of matrix A ..math: \begin{bmatrix} 1 \ 4 \ 7 \ 2 \ 5 \ 8 \ 3 \ 6 \ 9 \ \end{bmatrix}