A Quick Tutorial on MATLAB EECS @ Michigan（快速EECS MATLAB教程@密歇根）.pdf

A Quick Tutorial on MATLAB Gowtham Bellala MATLAB  MATLAB is a software package for doing numerical computation. It was originally designed for solving linear algebra type problems using matrices. It’s name is derived from MATrix LABoratory.  MATLAB has since been expanded and now has built-in functions for solving problems requiring data analysis, signal processing, optimization, and several other types of scientific computations. It also contains functions for 2-D and 3-D graphics and animation. MATLAB Variable names  Variable names are case sensitive.  Variable names can contain up to 63 characters ( as of MATLAB 6.5 and newer).  Variable names must start with a letter and can be followed by letters, digits and underscores. Examples : x = 2; abc_123 = 0.005; 1ab = 2; Error: Unexpected MATLAB expression MATLAB Special Variables  pi Value of π  eps Smallest incremental number  inf Infinity  NaN Not a number e.g. 0/0  i and j i = j = square root of -1  realmin The smallest usable positive real number  realmax The largest usable positive real number MATLAB Relational operators  MATLAB supports six relational operators. Less Than Less Than or Equal = Greater Than Greater Than or Equal = Equal To == Not Equal To ~= (NOT != like in C) MATLAB Logical Operators MATLAB supports three logical operators. not ~ % highest precedence and % equal precedence with or or |