1. Final Exam Review Part 2 - MATLAB
ChE 160 SI – Becca
Fall 2016

2. What are you concerned about?
MATLAB
What do you remember?
What are you concerned about?

3. Basics
What do these commands or notations do?
clc
clear % ; \n

4. Basics- Answers clc - clears command window clear - clears workspace
% - makes a comment
; - suppresses values from showing in command window
\n – return to the next line (like hitting enter)

5. Vectors
Fill in where the starting and ending values go and step size/number of places in the vector.
Spring_vector = _______:_______:_______ ;
Spring_vector2 = linspace(_______,________,________);

6. Vectors- Answers
Spring_vector = starting value : step size : end value ;
Spring_vector2 = linspace(start, end, number points)

7. Assorted How do you transpose/flip a vector or matrix?
What does the function input( ) do?
How do you use fprintf( )?

8. Assorted- Answers Single apostrophe transposes
column_vector = row_vector’ ;
input( ) allows the user to put in a value from the command window
Candy_Hearts = input(‘How many candy hearts do you eat each Valentine’s Day?’) ;
fprintf( ) displays text and numbers into the command window from script
fprintf(‘You eat %g candy hearts each Valentine’s Day. \n’, Candy_Hearts)

9. Graphing How do you plot 2 sets arrays of data?
What is the difference between plot(), semilogy(), and loglog()
How do you use ‘MarkerFaceColor’?
What is the letter for a line, circle, and triangle?
What is the letter for black, magenta, blue, green, and red?

10. Graphing- Answers How do you plot 2 sets arrays of data? plot(a,b)
What is the difference between plot(), semilogy(), and loglog()
Rectangular, semilog with y log scale, log-log plot
How do you use ‘MarkerFaceColor’?
Change color of the marker face in a plot to fill
What is the letter for a line, circle, and triangle?
‘-’ ‘o’ ‘^’
What is the letter for black, magenta, blue, green, and red?
‘k’ ‘m’ ‘b’ ‘g’ ‘r’

11. Polyfit/Polyval Why do you use polyfit and polyval?
What does polyfit find?
What does polyval find?
Fill in the blanks:
__ = polyfit(_____,______,_____);
__ = polyval(______,______);

12. Polyfit/Polyval- Answers
Why do you use polyfit and polyval? Fitted line for the data, linear regression for Matlab
What does polyfit find? Polynomial coefficients, m slope and b intercept
What does polyval find? Fitted dependent values
Fill in the blanks:
P = polyfit(x,y,[degree of polynomial]);
yfit= polyval(P,xfit);

13. What is the basic structure of…
Loops
What is the basic structure of…
For loop
If Loop
While Loop

14. for (counting statement) calculations and statements end
For Loops- Answers
for (counting statement) calculations and statements end

15. If Loops- Answers
if (conditional statement) calculation/statement elseif (conditional statement) else final option end

16. While Loops- Answers
%Initialize value while (conditional statement) calculations end

17. Loops
What is the difference between the structure of a for and while loop?
How can you use nested for loops to create matrix?

18. Loops- Answers
What is the difference between the structure of a for and while loop?
For iterates a certain number of times, while does it until a condition is met, unknown number of iterations
How can you use nested for loops to create matrix?
Matricx(r,c) = 3*r-c;

19. Matrices
[A][x] = [b]
[x] = [A]\[b]

20. Functions
Function [Outputvariable] = FunctionName(inputvariable) Calculations Outputvariable = calculation

21. How did that go?