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MATLAB TUTORIAL

Matlab Basics

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Purpose of this Section 

To illustrate simple uses of the MATLAB

Technical language

To help you understand under whatcircumstances is MATLAB a better choice

than spreadsheets and high-level languages

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What is MATLAB? 

A high-performance language for technicalcomputing (Mathworks, 1998)

Typical uses of MATLAB

Mathematical computations

Algorithmic development

Model prototyping (prior to complex model

development)Data analysis and exploration of data(visualization)

Scientific and engineering graphics for 

 presentation

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Why Matlab?

Because it simplifies the analysis of mathematical models

It frees you from coding in high-levellanguages (saves a lot of time - with somecomputational speed penalties)

Provides an extensible programming/visualization environment

Provides professional looking graphs 

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Foundation of Matlab

The name is derived from MATrix LABoratory  MATLAB is a case sensitive language (a variable

named “c” is different than another one called “C”)  MATLAB works with matrices everything

MATLAB understands is a matrix (from text to largecell arrays and structure arrays)

Various data types exist within MATLAB- single precision

- double precision

- integer (8 bit) 

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The Matlab Environment

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MATLAB has the following basic windowcomponents:

 Work-space

Displays all the defined variables.

 Command Window

To execute commands in the MATLAB

environment   Command History

Displays record of the commands used

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Command Window

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Command Window (Contd..)

The command window allows you to interact with

MATLAB just as if you type things in a calculator 

Cut and paste operations ease the repetition of tasks Use „up-arrow‟ key to repeat commands (command 

history) 

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Launch Pad

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Launch Pad (Contd…) 

The launch window allows you to quickly

select among various MATLAB components

and toolboxes

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Matlab Workspace

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Workspace(Contd…) 

Workspace of Matlab shows all the defined

variables along with their “order”, memory

space they occupy and the class to which they belong

Above are shown a few such variables

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Current Directory

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Current Directory (Contd…) 

Provides quick access to all files available in

your Path

Provides a brief description (when files arecommented out) of each M-file 

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Different Views

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Different Views (Contd…) 

The Matlab environment could be viewed in

various ways.

This could be accomplished by the VIEW pull-down menu as shown in the previous

slide.

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Matlab Help

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Matlab Help (Contd..)

Matlab Help is an extremely powerful

assistance to learn Matlab.

The Help not only contains the theoretical background but also shows the demos for 

implementation

The Matlab Help could be opened by usingthe HELP pull-down menu

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Matlab Help (Contd..)

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Matlab Help (Contd..)

Any command description can be found by

typing the command in the search field.

As shown above the command to take squareroot (sqrt) is searched 

We can also utilize the Matlab help from the

command window as shown in the next slide.

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Matlab Help (Contd..)

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To begin a new M-file

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How the source-code looks like

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The Whos Command

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Scalar Calculation

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Vector Calculation

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Matrix Calculation

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Thank You