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Lecture (5)
Programming (2)
Eng. Osama Talaat
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Announcement
 M-Files are available:
 Download the file from the course page
www.osamatalaat.com/matlab
 Copy it into the current directory
 Open it using MATLAB (Open, Double
click, ... )
 Run !!
3
clear all;
close all;
clc;
Clean
Start
% n=input('Please enter the number of cycles: ');
% f=input('Please enter the frequency: ');
% A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi];
y=sin(x);
plot(x,y)
xlabel('x')
ylabel('sin(x)')
title('Sine Curve')
grid
disp('The amplitude values are: ')
y
disp('Plotting Done Successfully!!')
4
clear all;
close all;
clc;
No of
Cylces
n=input('Please enter the number of cycles: ');
% f=input('Please enter the frequency: ');
% A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi*n];
y=sin(x);
plot(x,y)
xlabel('x')
ylabel('sin(x)')
title('Sine Curve')
grid
disp('The amplitude values are: ')
y
disp('Plotting Done Successfully!!')
5
clear all;
close all;
clc;
Amplitude
n=input('Please enter the number of cycles: ');
% f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi*n];
y=A*sin(x);
plot(x,y)
xlabel('x')
ylabel([num2str(A) 'sin(x)'])
title('Sine Curve')
grid
disp('The amplitude values are: ')
y
disp('Plotting Done Successfully!!')
6
clear all;
close all;
clc;
Frequency
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi*n/f];
y=A*sin(f*x);
plot(x,y)
xlabel('x')
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve')
grid
disp('The amplitude values are: ')
y
disp('Plotting Done Successfully!!')
7
clear all;
close all;
clc;
Done !!
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi*n/f];
y=A*sin(f*x);
plot(x,y)
xlabel('x')
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve')
grid
disp('The amplitude values are: ')
y
disp('Program Terminated !!')
8
clear all;
close all;
clc;
Output
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi*n/f];
y=A*sin(f*x);
plot(x,y)
xlabel('x')
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve')
grid
disp('The amplitude values are: ')
y
disp('Program Terminated !!')
9
clear all;
close all;
clc;
Output
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
x=[0:0.1:2*pi*n/f];
y=A*sin(f*x);
plot(x,y)
xlabel('x')
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve')
grid
disp('The amplitude values are: ')
disp(y)
disp('Program Terminated !!')
10
Plot Sine
 Try n = any negative number:
clear all;
close all;
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clc;
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
if n>0
x=[0:0.1:2*pi*n/f]; y=A*sin(f*x);
plot(x,y)
xlabel('x');
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve'); grid
disp('The amplitude values are: '); disp(y)
end
disp('Program Terminated !!')
If Statement
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if conditions
________________________
______ Commands ________
________________________
end
________________________
______ Commands ________
________________________
clear all;
close all;
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Error Msg
clc;
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
if n>0
x=[0:0.1:2*pi*n/f]; y=A*sin(f*x);
plot(x,y)
xlabel('x');
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve'); grid
disp('The amplitude values are: '); disp(y)
else
disp('The number of cycles must be positive')
end
disp('Program Terminated !!')
If Else Statement
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if conditions
________________________
______ Commands ________
________________________
else
________________________
______ Commands ________
________________________
end
________________________
______ Commands ________
________________________
...
if n>0
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Compare
x=[0:0.1:2*pi*n/f]; y=A*sin(f*x);
plot(x,y); xlabel('x');
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve'); grid
disp('The amplitude values are: '); disp(y)
else
disp('The number of cycles must be positive')
end
......................................................
if n>0
x=[0:0.1:2*pi*n/f]; y=A*sin(f*x);
plot(x,y); xlabel('x');
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve'); grid
disp('The amplitude values are: '); disp(y)
end
if n<=0
disp('The number of cycles must be positive')
end
...
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Comments
clear all; close all; clc;
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
if n>0 %Check positive number of cycles
x=[0:0.1:2*pi*n/f]; y=A*sin(f*x);
plot(x,y)
xlabel('x');
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve'); grid
disp('The amplitude values are: '); disp(y)
else
disp('The number of cycles must be positive')
end
disp('Program Terminated !!')
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Comments
clear all; close all; clc;
n=input('Please enter the number of cycles: ');
f=input('Please enter the frequency: ');
A=input('Please enter the Amplitude: ');
if n>0 %Check positive number of cycles
x=[0:0.1:2*pi*n/f]; y=A*sin(f*x);
plot(x,y)
xlabel('x');
ylabel([num2str(A) 'sin(' num2str(f) 'x)'])
title('Sine Curve'); grid
% disp('The amplitude values are: '); disp(y)
else
disp('The number of cycles must be positive')
end
disp('Program Terminated !!')
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Password
 Enter the password.
 If the entered password is ‘a13’, display a
welcome message ‘Welcome Osama’.
 Else, Display an error message ‘Wrong password’.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
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Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear all; close all; clc;
pass = input('Please enter password: ','s');
if strcmp(pass,'a13')
disp('Welcome Osama')
else
disp('Wrong password')
end
To enter
string
To compare
strings
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Password
 Enter the password.
 If the entered password is ‘a13’, display a
welcome message ‘Welcome Osama’.
 If the entered password is ‘com’, display a
welcome message ‘Welcome Hamdy’.
 If the entered password is ‘t10’, display a
welcome message ‘Welcome Mona’.
 Else, Display an error message ‘Wrong password’.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
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Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear all;
close all;
clc;
pass = input('Please enter password: ','s');
if strcmp(pass,'a13')
disp('Welcome Osama')
elseif strcmp(pass,'com')
disp('Welcome Hamdy')
elseif strcmp(pass,'t10')
disp('Welcome Mona')
else
disp('Wrong password')
end
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If Elseif Statement
if conditions 1
________________________
______ Commands ________
________________________
elseif conditions 2
________________________
______ Commands ________
________________________
elseif conditions 3
________________________
______ Commands ________
________________________
...
else
________________________
______ Commands ________
________________________
end
________________________
______ Commands ________
________________________
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Switch Case Statement
switch variable
case value 1
______ Commands
break
case value 2
______ Commands
break
case value 3
______ Commands
break
. . .
otherwise
______ Commands
break
end
________________________
______ Commands ________
________________________
________
________
________
________
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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clear all;
close all;
clc;
pass = input('Please enter password: ','s');
switch pass
case 'a13'
disp('Welcome Osama')
break
case 'com'
disp('Welcome Hamdy')
break
case 't10'
disp('Welcome Mona')
break
otherwise
disp('Wrong password')
break
end
Another
Solution
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Error Msg
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clear all;
close all;
clc;
pass = input('Please enter password: ','s');
switch pass
case 'a13'
disp('Welcome Osama')
break
case 'com'
disp('Welcome Hamdy')
break
case 't10'
The error message stops execution
disp('Welcome Mona')
break
otherwise
error('Wrong password')
break
end
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Length Units Converter
 Convert the length from meter to several length
units.
 Enter the length in meters.
 Enter the unit to convert to.
 Switch on the unit and upon its values multiply
the input length by the conversion factor, and
display the output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Several
values
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clear all; close all; clc;
len = input('Please enter Length in meter: ');
unit = input('Please enter the unit to convert to: ','s');
switch unit
case 'cm'
disp([num2str(len)
break
case 'mm'
disp([num2str(len)
break
case 'in'
disp([num2str(len)
break
otherwise
disp('This unit is
break
end
' m = ' num2str(len*100) ' cm'])
' m = ' num2str(len*1000) ' mm'])
' m = ' num2str(len/0.0254) ' in'])
not supported')
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Designed by: Eng. Osama Talaat
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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clear all; close all; clc;
len = input('Please enter Length in meter: ');
unit = input('Please enter the unit to convert to: ','s');
switch unit
case {'cm' 'centimeter'}
disp([num2str(len) ' m
break
case {'mm' 'millimeter'}
disp([num2str(len) ' m
break
case {'in' 'inch'}
disp([num2str(len) ' m
break
otherwise
disp('This unit is not
break
end
= ' num2str(len*100) ' cm'])
= ' num2str(len*1000) ' mm'])
= ' num2str(len/0.0254) ' in'])
supported')
For Loop
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clear all; close all; clc;
for k=1:20
disp(rand) %do not display "ans ="
end
________________________________________
for index = vector
________________________
__ Commands to repeat __
________________________
end
________________________
______ Commands ________
________________________
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Calculate the Formula
5
𝑠=
𝑘2
𝑘!
𝑘=1
22 32
12
42 52
∴𝑠=
+ + + +
1! 2! 3! 4! 5!
>> s=0;
>> s=s+1^2/factorial(1);
>> s=s+2^2/factorial(2);
>> s=s+3^2/factorial(3);
>> s=s+4^2/factorial(4);
>> s=s+5^2/factorial(5);
Calculate the Formula
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clear all; close all; clc;
s=0;
for k=1:5
s=s+k^2/factorial(k);
end
disp(s)
Test Yourself !!
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 Try it using matrices:
5
𝑠=
𝑘=1
𝑘 2 12 22 32 42 52
=
+ + + +
𝑘! 1! 2! 3! 4! 5!
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GOOD LUCK
To be continued in the next lecture …