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    MATLAB Intro

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    attitude23

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    MATLAB Intro

    Uploaded by

    attitude23
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    Copyright:

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    Download as docx, pdf, or txt
    45 views5 pages

    MATLAB Intro

    Uploaded by

    attitude23

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 5

    The MATLAB® is high-performance language for technical computing integrates

    computation, visualization, and programming in an easy-to-use environment where problems


    and solutions are expressed in familiar mathematical notation. Typical uses include

     Math and computation

     Algorithm development

     Data acquisition

     Modelling, simulation, and prototyping

     Data analysis, exploration, and visualization

     Scientific and engineering graphics

     Application development, including graphical user interface building

    MATLAB is an interactive system whose basic data element is an array that does not require
    dimensioning. It allows you to solve many technical computing problems, especially those
    with matrix and vector formulations, in a fraction of the time it would take to write a program
    in a scalar noninteractive language such as C or FORTRAN.

    The name MATLAB stands for matrix laboratory. MATLAB was originally written to
    provide easy access to matrix software developed by the LINPACK and EISPACK projects.
    Today, MATLAB engines incorporate the LAPACK and BLAS libraries, embedding the
    state of the art in software for matrix computation.

    MATLAB has evolved over a period of years with input from many users. In university
    environments, it is the standard instructional tool for introductory and advanced courses in
    mathematics, engineering, and science. In industry, MATLAB is the tool of choice for high-
    productivity research, development, and analysis.

    MATLAB features a family of add-on application-specific solutions called toolboxes. Very


    important to most users of MATLAB, toolboxes allow you to learn and apply specialized
    technology. Toolboxes are comprehensive collections of MATLAB functions that extend the
    MATLAB environment to solve particular classes of problems. You can add on toolboxes for
    signal processing, control systems, neural networks, fuzzy logic, wavelets, simulation, and
    many other areas

    Key Features

     High-level language for technical computing


     Development environment for managing code, files, and data
     Interactive tools for iterative exploration, design, and problem solving
     Mathematical functions for linear algebra, statistics, Fourier analysis, filtering,
    optimization, and numerical integration
     2-D and 3-D graphics functions for visualizing data
     Tools for building custom graphical user interfaces
     Functions for integrating MATLAB based algorithms with external applications and
    languages, such as C, C++, Fortran, Java, COM, and Microsoft Excel

    The MATLAB System

    The MATLAB system consists of these main parts:

    Desktop Tools and Development Environment

    This part of MATLAB is the set of tools and facilities that help you use and become more
    productive with MATLAB functions and files. Many of these tools are graphical user
    interfaces. It includes: the MATLAB desktop and Command Window, an editor and
    debugger, a code analyzer, and browsers for viewing help, the workspace, and folders.

    Mathematical Function Library

    This library is a vast collection of computational algorithms ranging from elementary


    functions, like sum, sine, cosine, and complex arithmetic, to more sophisticated functions like
    matrix inverse, matrix Eigen values, Bessel functions, and fast Fourier transforms.

    The Language

    The MATLAB language is a high-level matrix/array language with control flow statements,
    functions, data structures, input/output, and object-oriented programming features. It allows
    both "programming in the small" to rapidly create quick programs you do not intend to reuse.
    You can also do "programming in the large" to create complex application programs intended
    for reuse.
    Graphics

    MATLAB has extensive facilities for displaying vectors and matrices as graphs, as well as
    annotating and printing these graphs. It includes high-level functions for two-dimensional and
    three-dimensional data visualization, image processing, animation, and presentation graphics.
    It also includes low-level functions that allow you to fully customize the appearance of
    graphics as well as to build complete graphical user interfaces on your MATLAB
    applications.

    External Interfaces

    The external interfaces library allows you to write C and FORTRAN programs that interact
    with MATLAB. It includes facilities for calling routines from MATLAB (dynamic linking),
    for calling MATLAB as a computational engine, and for reading and writing MAT-files.

    Documentation

    The MATLAB program provides extensive documentation, in both printable and HTML
    format, to help you learn about and use all of its features.

    The MATLAB documentation is organized into these main topics:

     Desktop Tools and Development Environment — Startup and shutdown, arranging


    the desktop, and using tools to become more productive with MATLAB

     Data Import and Export — Retrieving and storing data, memory-mapping, and
    accessing Internet files

     Mathematics — Mathematical operations

     Data Analysis — Data analysis, including data fitting, Fourier analysis, and time-
    series tools

     Programming Fundamentals — The MATLAB language and how to develop


    MATLAB applications

     Object-Oriented Programming — Designing and implementing MATLAB classes

     Graphics — Tools and techniques for plotting, graph annotation, printing, and
    programming with Handle Graphics® objects

     3-D Visualization — Visualizing surface and volume data, transparency, and viewing
    and lighting techniques

     Creating Graphical User Interfaces — GUI-building tools and how to write callback
    functions

     External Interfaces — MEX-files, the MATLAB engine, and interfacing to Sun


    Microsystems™ Java™ software, COM, Web services, and the serial port
    There is reference documentation for all MATLAB functions:

     Function Reference — Lists all MATLAB functions, listed in categories or


    alphabetically

     Handle Graphics Property Browser — Provides easy access to descriptions of


    graphics object properties

     C and Fortran API Reference — Covers functions used by the MATLAB external
    interfaces, providing information on syntax in the calling language, description,
    arguments, return values, and examples

    The MATLAB online documentation also includes

     Examples — An index of examples included in the documentation

     Release Notes — New features, compatibility considerations, and bug reports for
    current and recent previous releases

     Printable Documentation — PDF versions of the documentation, suitable for printing

    In addition to the documentation, you can access demos for each product from the Help
    browser. Run demos to learn about key functionality of MathWorks™ products and tools.

    Functions
    Functions are evaluated element wise, as in the sin(t) example above. For example, if we type
    >> t = linspace(0,4pi,9); then t is a vector containing 9 time samples. If we then type
    >> x = sin(t), then MATLAB creates the vector x with 9 values corresponding to the sin of
    each of the elements of the vector t, i.e. x = 0 1 0 -1 -0 1 0 -1 0

    Operators
    Since MATLAB generally deals with matrices, you must be careful when using operators like
    “*” or “/”. If you want these operators to operate in an element-by-element fashion you have
    to denote this by a leading period, e.g.“.*” and “./” !

    Writing Programs in MATLAB


    You can also write your own programs in MATLAB using any regular ASCII text editor.
    Simply open a file with the extension .m (which is called an m-file) and edit line-by-line the
    sequence of commands you want to include in your program. Save the file and execute the
    program by typing the name of the file (without the .m) on your MATLAB command line.

    Complex Numbers and Constants


    Both i and j are defined by default to be sqrt(−1), unless you assign them to some other value.
    Thus MATLAB can handle complex numbers. It also has many built-in variables:
    >> x=2+3*j
    >> y=pi

    Control Flow in M-Files


    MATLAB also provides the usual programming language commands for-end, if-else-break-
    end and while-end. For example, try the following:
    >> for c=1:2:12; disp(c); end;

    Generating Matrices
    MATLAB also provides several commands to generate matrices. Try out the following.
    >> A = [1 2 3; 4 5 6; 7 8 9]
    >> B = eye(3)
    >> C = ones(2,3)
    >> D = zeros(3,2)

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