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Lecture (5)

Lecture (5). Programming (2) Eng. Osama Talaat. 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 !!. Clean Start. clear all ; close all ;

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Lecture (5)

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  1. Lecture (5) Programming (2) Eng. Osama Talaat

  2. 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. Clean Start 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: '); 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. No of Cylces 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: '); 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. Amplitude 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: '); 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. Frequency 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: '); 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. Done !! 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: '); 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. Output 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: '); 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. Output 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: '); 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:

  11. 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 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 !!')

  12. If Statement ifconditions ________________________ ______ Commands ________ ________________________ end ________________________ ______ Commands ________ ________________________

  13. Error Msg 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 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 !!')

  14. If Else Statement ifconditions ________________________ ______ Commands ________ ________________________ else ________________________ ______ Commands ________ ________________________ end ________________________ ______ Commands ________ ________________________

  15. Compare ... 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 ...................................................... ifn>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 ...

  16. Comments %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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 !!')

  17. Comments %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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 !!')

  18. Password • Enter the password. • If the entered password is ‘a13’, display a welcome message ‘Welcome Osama’. • Else, Display an error message ‘Wrong password’.

  19. To enter string %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% clear all; close all; clc; pass = input('Please enter password: ','s'); ifstrcmp(pass,'a13') disp('Welcome Osama') else disp('Wrong password') end To compare strings

  20. 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’.

  21. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% clear all; close all; clc; pass = input('Please enter password: ','s'); ifstrcmp(pass,'a13') disp('Welcome Osama') elseifstrcmp(pass,'com') disp('Welcome Hamdy') elseifstrcmp(pass,'t10') disp('Welcome Mona') else disp('Wrong password') end

  22. If Elseif Statement ifconditions 1 ________________________ ______ Commands ________ ________________________ elseifconditions 2 ________________________ ______ Commands ________ ________________________ elseifconditions 3 ________________________ ______ Commands ________ ________________________ ... else ________________________ ______ Commands ________ ________________________ end ________________________ ______ Commands ________ ________________________

  23. Switch Case Statement switchvariable casevalue 1 ______ Commands ________ break casevalue 2 ______ Commands ________ break casevalue 3 ______ Commands ________ break . . . otherwise ______ Commands ________ break end ________________________ ______ Commands ________ ________________________

  24. Another Solution %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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

  25. Error Msg %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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 error('Wrong password') break end The error message stops execution

  26. 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

  27. Several values %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% clear all; close all; clc; len = input('Please enter Length in meter: '); unit = input('Please enter the unit to convert to: ','s'); switchunit case'cm' disp([num2str(len) ' m = 'num2str(len*100) ' cm']) break case'mm' disp([num2str(len) ' m = 'num2str(len*1000) ' mm']) break case'in' disp([num2str(len) ' m = ' num2str(len/0.0254) ' in']) break otherwise disp('This unit is not supported') break end

  28. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Designed by: Eng. Osama Talaat % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% clear all; close all; clc; len = input('Please enter Length in meter: '); unit = input('Please enter the unit to convert to: ','s'); switchunit case{'cm' 'centimeter'} disp([num2str(len) ' m = 'num2str(len*100) ' cm']) break case{'mm' 'millimeter'} disp([num2str(len) ' m = 'num2str(len*1000) ' mm']) break case{'in' 'inch'} disp([num2str(len) ' m = ' num2str(len/0.0254) ' in']) break otherwise disp('This unit is not supported') break end

  29. For Loop clear all; close all; clc; for k=1:20 disp(rand) %do not display "ans =" end ________________________________________ forindex = vector ________________________ __ Commands to repeat __ ________________________ end ________________________ ______ Commands ________ ________________________

  30. Calculate the Formula >> 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);

  31. Calculate the Formula clear all; close all; clc; s=0; for k=1:5 s=s+k^2/factorial(k); end disp(s)

  32. Test Yourself !!

  33. GOOD LUCK To be continued in the next lecture …

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