- An
**array**is simply a collection of numbers or strings (text) and matrices are 2-dimensional arrays e.g. collection of numbers in the horizontal and vertical directions to make a square or rectangle of numbers. - MATLAB is capable of computing 3-dimensional arrays (imagine a cube or cuboid of numbers) or higher but these are quite difficult to imagine. This course would be chiefly based on
**number matrices**. (For information on more complex arrays and manipulation of strings follow this link: String Arrays) - Matrices are an integral component in computation with MATLAB. Even parameters declared as single numbers (e.g. A = 2) are understood as
**1-by-1**matrices by the program. - NB: All code or commands within the text that appear as they would in the MATLAB code, will be highlighted in
`light blue`

. Also, it is recommended that you**revise**matrix algebra before going through the instructions that follow; doing a couple of hand calculations to verify some of the results displayed below would go a long way in improving understanding and retention of the material.