B: MATLAB Introduction
The name MATLAB stands for matrix
laboratory.
Features:
•
•
•
•
•
•
•
Math and computation
Algorithm development
Data acquisition
Modeling, simulation, and prototyping
Data analysis, exploration, and visualization
Scientific and engineering graphics
Application development, including graphical
user interface building.
In short, MATLAB integrates data structure,
programming and graphical user interface
together.
On Windows platforms, start MATLAB by
double-clicking the MATLAB shortcut icon on
your Windows desktop.
MATLAB Desktop
• Use desktop tools to manage your work in MATLAB. You can also
use MATLAB functions to perform the equivalent of most of the
features found in the desktop tools.
Matlab major features and applications
• Desktop Tools and Development
Environment
• The MATLAB Mathematical Function
Library
• The MATLAB Language
• Graphics
• MATLAB External Interfaces
Command Window
• Use the Command Window to enter variables and to run functions
and M-file scripts.
Ex 1.
Ex 2.
Command History
• Statements you enter in the Command Window are logged in the
Command History. From the Command History, you can view and
search for previously run statements, as well as copy and execute
selected statements. You can also create an M-file from selected
statements.
Help Browser
• To open the Help browser, click the Help button
in the desktop
toolbar.
• The Help browser consists of two panes, the Help Navigator, which
you use to find information, and the display pane, where you view
the information.
Current Directory
Workspace Browser
• The MATLAB workspace consists of the set of variables (named
arrays) built up during a MATLAB session and stored in this
temporary memory. The features (e.g. dimension and data type) of
these variables can be viewed in the workspace and these stored
variables can be used in the subsequent calculation.
• To delete variables from the workspace, select the variables and
select Edit > Delete. Alternatively, use the clear function.
• The core of MATLAB is array and matrix to
conduct calculation and to store data.
Creating Matrices
Array Editor
• Double-click a variable in the Workspace browser, or use openvar
variablename, to see it in the Array Editor. Use the Array Editor to
view and edit a visual representation of variables in the workspace.
Adding and Subtracting Matrices
Working with Workspace
Use mathematical functions in Matlab
Polynomials
• Polynomials p(x) = x3 – 6x2 – 11x – 6 is represented as
• The roots function calculates the roots of a polynomial:
• The function poly returns the polynomial coefficients:
Interpolation
Interpolation
• Linear interpolation (default)
• Nearest neighbor interpolation
• Cubic spline interpolation
Running M-files in the Editor/Debugger