Lab 2 Answer Sheet

Name: _____________________________________ Section # _____________

Due Date: During Lab period

Lab Activity #2 Answer Sheet

Part 1 Matlab constants

1.
>> string = [ 'test' ,    _________________________________________________ ];

number           __________________________________________________

string               __________________________________________________

Return to lab instructions on the web.

Part 2 Matlab operators

2. ___________________________________________

3. __________________________________________

4. ___________________________________________

____________________________________________

5. _____________________________________________

6. _____________________________________________

7. _____________________________________________

8. ______________________________________________

9. ______________________________________________

10. ______________________________________________

11. ______________________________________________

12. ______________________________________________

13. ______________________________________________

Return to lab instructions.

Part 3. Vector carving (subscripting)

14. ______________________________________________

15. _____________________________________________

16. _____________________________________________

17. _____________________________________________(approx.)

18. ______________________________________________(approx.)

19. >> z = [ 0 , ___________________________________ ]
(The correct answer must use the variable y and subscripting on y)

20. >> flipy = y( end : _____________ : _______________ )

Return to the lab instructions.

Part 4 Matlab functions

21. >>floor( ___________________ * _____________________ ) + 1

22. random = __________________________________________________________

Return to the lab instructions.

Part 6 Symbolics in Matlab

23. __________________________________________________________

24. (Just write the answer, don't write the intermediate results)     ans = ________________________________________   (Euler's formula)

25. Fill in the blank below to simplify the mathematical function cos(2x) / (cos²(x)-sin²(x)).

     >> simple(________________________________________________________________)

Part 7 Discretization in Matlab

26. ________________________________________________________________________

27. >> x2 = ________________________________________________________________

>> y2 = ________________________________________________________________

Part 8 Plotting

28.
>> x = ____________________________

>> y = ____________________________

>> plot( _______________________ , ____________________________, ___________________________)

29. Does plot(x2,y2) give the same results as plot(y2,x2) ________________________(YES/NO)?

Part 9 Differentiation

30. Which value of h gives us the best approximation to the derivative, that is, which value of h gives us the smallest error?

h = ________________________________________________________________

31.

>> midpoints = _________________________________________________________ ;

32.
>> yprimes = ________________________________________________________ ;

Part 10 Logical values and operators

33. >> w = v ( _____________________________________________________)

34. >> w = v ( _____________________________________________________)

35. r = _________________________________________________ ;

36. result = ______________________________________________ ;

Congratulations, you are done!