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Square, row and column matrices

There are special type of matrices depending on their size.

• A square matrix has the same number of rows and columns.
• A row matrix is a matrix with one row only. It is also called a row vector.
• A column matrix is a matrix with one column only. It is also called a column vector.

Examples of a square matrix, a row vector and a column vector:

$$\begin{pmatrix}1&2\\-1&0\end{pmatrix},\quad \begin{pmatrix}1&2\end{pmatrix},\quad \begin{pmatrix}1\\0\\3\end{pmatrix}.$$
A square matrix