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MATLAB
Eng. Osama Talaat
osama063@msn.com
Faculty of Engineering, Zagazig University, Egypt 2013
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Course Web Page
www.osamatalaat.com/matlab
 You can also navigate to it by:
www.osamatalaat.com >> Teaching >> Matlab.
 You shall find lecture materials and course
resources.
 Bookmark this page and keep visiting it
regularly after each lecture to download its
material.
About MATLAB
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Calculator
Solving Equations
Matrices
Graphs
Programming
Language
Console programs
GUI
Toolboxes
Communication
Control Systems
Image Processing
Simulation Simulink
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Lecture (1)
Introduction
Eng. Osama Talaat
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MATLAB R2013a
 Latest version – Download from the webpage.
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MATLAB Setup
Open
MATLAB
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Arithmetic Operators
10 + 2
10 – 2
10 × 2
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Arithmetic Operators
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10 ÷ 2
/
\
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Layout: Command Window
 Clear command window using GUI
 Clear command window using Commands
>> clc
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Layout: Command History
 Clear command history
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Layout Controllers
 Undock → Dock
 Maximize → Restore.
 Minimize → Restore.
 Move the tab.
‫‪Variables‬‬
‫قيمة مباشرة‬
‫ناتج عملية‬
‫حسابية‬
‫متغير من آخر‬
‫‪12‬‬
Variables
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‫متغير من نفسه‬
NB: Names (variables, files, …)
 characters & Numbers, but starts with char.
 No spaces.
 No symbols except underscores (_).
 Case sensitive (also commands).
 Maximum length = 64 (increasing value).
NB: display variable value.
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Note: Simi-Colon (;)
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Note: Multiplying by variable
No implicit multiplying sign
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Layout: Workspace
 Save variables …
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Layout: Current Directory
 Current Directory address
bar.
 Change Current Directory.
Layout: Workspace
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 Save variables:
 Ctrl + S
 GUI
 Code
>> save osama.mat
 Clear workspace using
GUI and Code.
>> clear a
>> clear b c
>> clear
 Load saved variables:
 Ctrl + O
 Code
>> load osama.mat
‫‪Special Values: ans‬‬
‫ناتج‬
‫آخر‬
‫عملية‬
‫حسابية‬
‫لم‬
‫يتم‬
‫تخزينها‬
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Special Values: PI, INF
𝜋 = 3.14
Infinity
∞
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Special Values: NaN
‫كمية‬
‫غير‬
‫محددة‬
Trigonometric Functions
>> sin(x)
>> sind(x)
>> cos(x)
>> cosd(x)
>> tan(x)
>> tand(x)
>> sec(x)
>> secd(x)
>> csc(x)
>> cscd(x)
>> cot(x)
>> cotd(x)
Degrees
Radian by default
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Inverse Trigonometric Functions
Radian
Degrees
>> asin(x)
>> asind(x)
>> acos(x)
>> acosd(x)
>> atan(x)
>> atand(x)
>> asec(x)
>> asecd(x)
>> acsc(x)
>> acscd(x)
>> acot(x)
>> acotd(x)
Maths
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Hyperbolic Functions
>> sinh(x)
>> asinh(x)
>> cosh(x)
>> acosh(x)
>> tanh(x)
>> atanh(x)
>> sech(x)
>> asech(x)
>> csch(x)
>> acsch(x)
>> coth(x)
>> acoth(x)
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Other Mathematical Functions
>> log10(100)
>> log2(1024)
>> log(3)
>> exp(3)
>> abs(-12)
>> sqrt(16)
>> nthroot(27,3)
Test yourself
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 If x=1 calculate the following:
𝑓=
5 log 𝑥+2𝑥 3 sin 𝑥+ln 𝑥 𝑥
2
6𝑥
𝑒
+3𝑥 4 +cos 𝑥
>> x=1;
>> f=( 5*log10(x)+2*x^3*sin(x)+log(x)*sqrt(x) ) / (
exp(6*x^2)+3*x^4+cos(x) )
f =
0.0041
‫‪Other Mathematical Functions‬‬
‫إيجاد األعداد‬
‫األولية حتى‬
‫الرقم ‪10‬‬
‫اختبار‬
‫هل‬
‫العدد‬
‫أولي‬
‫أم‬
‫ال‬
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‫‪Other Mathematical Functions‬‬
‫تحليل العدد إلى‬
‫مكوناته األولية‬
‫مضروب العدد‬
‫!‪5‬‬
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Complex Numbers
i or j
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Complex Numbers
Using i or
j as
variables
implicit
multiplying
sign
‫‪Complex Numbers‬‬
‫القيمة‬
‫المطلقة للعدد‬
‫المركب‬
‫زاوية العدد‬
‫المركب‬
‫المرافق‬
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‫‪Complex Numbers‬‬
‫الجزء الحقيقي‬
‫الجزء التخيلي‬
‫اختبار وجود‬
‫جزء تخيلي من‬
‫عدمه‬
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Complex Numbers
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Approximation Functions
Normal
Approximation
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Approximation Functions
Round
towards
positive
infinity
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Approximation Functions
Round
towards
negative
infinity
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Approximation Functions
Round
towards
Zero
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Approximation Functions
Round
towards
Zero
Help !!
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 Demos.
MATLAB Tips
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>> bench
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GOOD LUCK
To be continued in the next lecture …