chapter  18
26 Pages

Matrices and Sets of Linear Equations

A matrix is defined by specifying the rows and columns of the array. An m by n matrix has m rows and n columns. A square matrix has the same number of rows and columns, n rows and n columns, which is denoted as n× n. The following example

1.8000 7.2300 4.4000

A matrix of dimension m× 1 is known as a column vector and a matrix of dimension 1× n is known as a row vector. A vector is considered a special case of a matrix with one row or one column. A row vector of size n is typically a matrix with one row and n columns. A column vector of size m is a matrix with m rows and one column.