【實(shí)例簡介】Matlab Primer

【實(shí)例截圖】

【核心代碼】

Quick Start

1

MATLAB Product Description ........................... 1-2

Key Features ..................................... 1-2

Desktop Basics ....................................... 1-3

Matrices and Arrays .................................. 1-5

Array Indexing ...................................... 1-10

Workspace Variables ................................. 1-12

Text and Characters .................................. 1-13

Text in String Arrays ............................... 1-13

Data in Character Arrays ........................... 1-14

Calling Functions .................................... 1-15

2-D and 3-D Plots .................................... 1-17

Programming and Scripts ............................. 1-24

Scripts ......................................... 1-24

Live Scripts ..................................... 1-25

Loops and Conditional Statements .................... 1-26

Script Locations .................................. 1-27

Help and Documentation ............................. 1-28

v

Contents

Language Fundamentals

2

Matrices and Magic Squares ........................... 2-2

About Matrices .................................... 2-2

Entering Matrices .................................. 2-4

sum, transpose, and diag ............................ 2-5

The magic Function ................................ 2-7

Generating Matrices ................................ 2-8

Expressions ......................................... 2-9

Variables ........................................ 2-9

Numbers ....................................... 2-10

Matrix Operators ................................. 2-11

Array Operators .................................. 2-11

Functions ....................................... 2-13

Examples of Expressions ........................... 2-14

Entering Commands ................................. 2-16

The format Function ............................... 2-16

Suppressing Output ............................... 2-17

Entering Long Statements .......................... 2-17

Command Line Editing ............................. 2-18

Indexing ........................................... 2-19

Subscripts ...................................... 2-19

The Colon Operator ............................... 2-20

Concatenation ................................... 2-21

Deleting Rows and Columns ......................... 2-22

Scalar Expansion ................................. 2-23

Logical Subscripting ............................... 2-23

The find Function ................................. 2-24

Types of Arrays ...................................... 2-26

Multidimensional Arrays ............................ 2-26

Cell Arrays ...................................... 2-28

Characters and Text ............................... 2-30

Structures ...................................... 2-33

vi Contents

Mathematics

3

Linear Algebra ....................................... 3-2

Matrices in the MATLAB Environment .................. 3-2

Systems of Linear Equations ......................... 3-13

Factorizations .................................... 3-25

Powers and Exponentials ........................... 3-32

Eigenvalues ..................................... 3-35

Singular Values .................................. 3-39

Operations on Nonlinear Functions ..................... 3-44

Function Handles ................................. 3-44

Function Functions ................................ 3-44

Multivariate Data .................................... 3-48

Data Analysis ....................................... 3-49

Introduction ..................................... 3-49

Preprocessing Data ............................... 3-49

Summarizing Data ................................ 3-55

Visualizing Data .................................. 3-59

Modeling Data ................................... 3-70

Graphics

4

Basic Plotting Functions ............................... 4-2

Creating a Plot .................................... 4-2

Plotting Multiple Data Sets in One Graph ................ 4-4

Specifying Line Styles and Colors ...................... 4-6

Plotting Lines and Markers ........................... 4-7

Graphing Imaginary and Complex Data .................. 4-9

Adding Plots to an Existing Graph ..................... 4-10

Figure Windows .................................. 4-12

Displaying Multiple Plots in One Figure ................ 4-12

Controlling the Axes ............................... 4-13

Adding Axis Labels and Titles ........................ 4-15

Saving Figures ................................... 4-16

Saving Workspace Data ............................ 4-17

vii

Creating Mesh and Surface Plots ....................... 4-19

About Mesh and Surface Plots ....................... 4-19

Visualizing Functions of Two Variables ................. 4-19

Display Images ...................................... 4-25

Image Data ...................................... 4-25

Reading and Writing Images ......................... 4-27

Printing Graphics ................................... 4-28

Overview of Printing ............................... 4-28

Printing from the File Menu ......................... 4-28

Exporting the Figure to a Graphics File ................ 4-28

Using the Print Command ........................... 4-29

Working with Graphics Objects ........................ 4-30

Graphics Objects ................................. 4-30

Setting Object Properties ........................... 4-33

Functions for Working with Objects ................... 4-35

Passing Arguments ................................ 4-36

Finding the Handles of Existing Objects ................ 4-37

Programming

5

Control Flow ......................................... 5-2

Conditional Control — if, else, switch ................... 5-2

Loop Control — for, while, continue, break ............... 5-5

Program Termination — return ........................ 5-7

Vectorization ..................................... 5-7

Preallocation ..................................... 5-8

Scripts and Functions ................................. 5-9

Overview ........................................ 5-9

Scripts ......................................... 5-10

Functions ....................................... 5-11

Types of Functions ................................ 5-13

Global Variables .................................. 5-15

Command vs. Function Syntax ....................... 5-15

viii Contents

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