A column matrix is a type of matrix that consists of a single column and multiple rows. It is often used in mathematics and computer science to represent vectors or data points. Each entry in the column can represent a different value, such as coordinates in space or coefficients in an equation. In a column matrix, the dimensions are typically expressed as m \times 1 , where m is the number of rows. For example, a column matrix with three rows would look like this: \[ \beginbmatrix a \\ b \\ c \endbmatrix \] This format is essential in various applications, including linear algebra and machine learning, where it helps in organizing and manipulating data efficiently.