MATLAB Programming

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MATLAB is a programming language developed by The MathWorks. It started out as a matrix programming language where linear algebra programming was simple. It can be run both under interactive sessions as well as a batch job.

GNU Octave and LabVIEW MathScript are systems for numerical computations with an m-file script language that is mostly compatible with MATLAB. Both alternatives can replace MATLAB in many circumstances. While a good deal of the content of this book will also apply to both Octave and LabVIEW MathScript, it is not guaranteed to work in exactly the same manner. Differences and comparison between MATLAB and Octave are presented in Comparing Octave and MATLAB.

Contents 1 A Tutorial Introductions 2 Basic MATLAB Concepts 2.1 Saving and loading a MAT-file 2.2 The MATLAB Command Prompt 3 Data Storage and Manipulation 3.1 Data Types and Operators on Point Values 3.2 Arrays and Matrices 4 Graphics 4.1 Graphics 4.2 Handle Graphics 4.3 Annotating Plots 5 M-file Programming 5.1 Scripts 5.2 Control Flow 5.3 Error Messages 5.4 Debugging M Files 6 Numerical Manipulation 6.1 Linear Algebra 6.2 Differential Equations 7 More advanced I/O 7.1 Writing and Reading to A Serial Port 7.2 Writing to a USB port 8 Examples 8.1 Filtering 8.2 Controls 8.3 Phase vocoder 9 Object Oriented Programming 9.1 Struct arrays 9.2 MATLAB classes 10 An alternative to MATLAB: Octave 10.1 What is Octave ? 10.2 Differences between Octave and MATLAB 11 Toolboxes and Extensions 11.1 Symbolic Toolbox 11.2 Image Processing Toolbox 11.3 MATLAB Compiler 11.4 Legacy Toolboxes 12 References 13 External links 14 Other Wikibooks 15 Organization

[edit] A Tutorial Introductions

[edit] Basic MATLAB Concepts

[edit] Saving and loading a MAT-file

• Commands
• File Naming conventions
• Basic Reading and Writing data from a file

[edit] The MATLAB Command Prompt

• Calculator

[edit] Data Storage and Manipulation

[edit] Data Types and Operators on Point Values

• Boolean and Rational
• Strings
• Portable Functions
• Complex Numbers

[edit] Arrays and Matrices

• What is an array?
• Introduction to array operations
• Vectors and Basic Vector Operations
• Struct Arrays
• Cell Arrays
• Sparse Matrices

[edit] Graphics

[edit] Graphics

• Plot
• Polar Plot
• Mesh
• Semilogx or Semilogy
• Loglog
• Bode Plot
• Nichols Plot
• Nyquist Plot

[edit] Handle Graphics

What is a handle?

Figure handles

Axis handles

Other types of handles

[edit] Annotating Plots

• Inserting Newlines into Plot Labels

[edit] M-file Programming

[edit] Scripts

• Comments
• The Input Function

[edit] Control Flow

• Loops and Branches

[edit] Error Messages

• MATLAB Caveats
• Inserting Newlines into Disp Warn and Error

[edit] Debugging M Files

[edit] Numerical Manipulation

[edit] Linear Algebra

It is the Matrix laboratory after all.

• Simple matrix manipulation

• Operations
• Transpose
• Systems of linear equations

• More complicated matrix operations

• Row reduced echelon form
• Inverse
• Coffactor, minor
• Jacobian

[edit] Differential Equations

• Ordinary Differential Equations
• Partial Differential Equations

[edit] More advanced I/O

Different versions of MATLAB handle this differently. We will focus on versions 6.5 and 7.x, primarily on MATLAB 7.x since it is the latest. A note will appear when the procedure is different for ver. 6.

I hope this will be helpful to people who want to use MATLAB for something useful.

[edit] Writing and Reading to A Serial Port

[edit] Writing to a USB port

[edit] Examples

[edit] Filtering

• Moving Average
• Alpha Beta
• Kalman

• PSD estimation
• Entropy
• Markov Processes
• Queuing Theory

[edit] Controls

[edit] Phase vocoder

See "Phase vocoder and encoder in MATLAB" for an example phase vocoder and the corresponding sound sample encoder in MATLAB.

[edit] Object Oriented Programming

MATLAB as well as Octave have object oriented capabilities. Yet, technically it is not fully an object oriented language.

An Object Oriented Language(OOL) has three components: 1. Polymorphism 2. Inheritance 3. Encapsulation

Octave can be extended by adding new objects. Those objects can overload the operators like e.g. assignment, slicing, comparison.

While in MATLAB, this can be done with m-script, in Octave new objects are implemented as C++ classes. A simple example of how objects can be added to Octave can be found here.

[edit] Struct arrays

[edit] MATLAB classes

[edit] An alternative to MATLAB: Octave

[edit] What is Octave ?

A short presentation of Octave and its history.

[edit] Differences between Octave and MATLAB

The most important differences between Octave and MATLAB that anyone willing to use Octave instead of MATLAB should be aware of.

[edit] Toolboxes and Extensions

The toolboxes are pretty good if you can afford them. In version 7 there are a lot of toolboxes.

[edit] Symbolic Toolbox

[edit] Image Processing Toolbox

[edit] MATLAB Compiler

[edit] Legacy Toolboxes

• GUIDE allows the creation of interactive user interfaces.
• Simulink is for modeling, simulating and analysing systems.
• Psychtoolbox is a set of tools that aid in vision research.
• Distributed computing- The distributed computing toolbox is a set of tools that aid in distributing models over a cluster.
• Optimization- The optimization toolbox includes various algorithms for minimization.

[edit] References

• MATLAB documentation from The MathWorks.

[edit] External links

• MATLAB at literateprograms.org
• ControlTheoryPro.com MATLAB Category

[edit] Other Wikibooks

A number of other wikibooks use MATLAB to teach their subjects. The following wikibooks make use of MATLAB:

• Signals and Systems
• Control Systems

[edit] Organization