Matrices

Anm×n matrix is a rectangular array of numbers withm rows, each of length n; equivalently, n columns, each of lengthm. For example,

A = [

4 2 −1 0 6 5

] is a 2×3 array; B =

⎡ ⎢⎢⎣

0 −1.5 2.1 6 −1.0 −3.5 1.0 2.2

⎤ ⎥⎥⎦ is a 4×2 array.