01_GENN004m_MATLABBasics

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GENN004: Introduction to Computers 09-Feb-

MATLAB Basics

MATLAB Basics

Overview

MATLAB Desktop

Command Window

Scripts

Practice


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MATLAB Basics

MATrix LABoratory (MATLAB)

Create a Folder with your FirstLastName in the

computer desktop (like ElsayedHemayed) to

store your work.

From the Start button (lower left corner of the

screen), browse the programs, find and start

MATLAB.

Explore the MATLAB desktop and take notes

The Command Window The Command

History Window

The Start Button

Workspace

Browser

Path Browser

Help Browser

Function Browser

MATLAB Desktop

The prompt

What are the usages of these items?

Try it and take notes

Current Folder


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MATLAB Basics

MATLAB Desktop

Write and calculate simple and complex

equations in the command window

Observe the workspace browser and the

command history. How their contents are

affected?

Use the help browser then the function

browser to learn and to get the square root of

a number x.

User Input

(What you typed)

Calculation Results

(What MATLAB computed from your statement)

Command Window


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MATLAB Basics

Command Window

Use the Up and Down keys while in thecommand window

Double click any line in the command history

Add semi-colon at the end of your statementin the command window.

Type whos in the command window. What doyou get?

Type clc in the command window. Whathappened?

Creating Scripts

Change the current folder to C:\ and observe the PathBrowser contents

Change the current folder to your FirstLastName folder

From MATLAB desktop menu select File NewScript

Type the following commands in the opened editor

Save this file as firstProgram

Click the Green Arrow to run these commands

Check the output in the command window

What is the purpose of this script?


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MATLAB Basics

Script Contents

Why to use script?

a = 1;

b = 5;

c = 6;

d = sqrt(b^2 - 4*a*c);

r1 = (-b - d)/(2*a)

r2 = (-b + d)/(2*a)

Statements in a program (script) are

executed in sequence

% A program fragment ...

x= 2*3.14

y= 1+x

x= 5

% What is y now?

6

7.28

Other value


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MATLAB Basics

Editing Scripts

Go to your FirstLastName folder on Windows

desktop

Double click to open your firstProgram file

Edit this script by adding your name at the

beginning of the script. Use % before your

name. Why?

Re-run the script and see the output at thecommand window.

Practice

1. Write and execute a script to calculate the area of arectangle

area=length x width;

2. Write and execute a script to calculate the distancebetween two points (x1,y1) and (x2,y2)

dist=sqrt((x2-x1)^2+(y2-y1)^2);

3. Write and execute a script to calculate your ownequation. (Bonus will be given to good ideas)

All scripts should be stored in your FirstLastName folderand have clear names.

01_GENN004m_MATLABBasics

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