Laboratory #2 Solution

PURPOSE: Further practice with MATLAB.




For each problem, create a MATLAB script file and name it FIRSTNAME_LASTNAME_LAB2_ problemX.m. Put ALL the commands for the required steps in your script file:

Be sure to clear the display and the memory.
Display your name.
Separate and label different steps using comments.
---------------------------------------------------------------------------------------------------------------------

%{

Class: ENGR15100: Software Tools for Engineers

Instructor: Xiaoli Yang

Author: [Student’s Name]

Assignment: Lab [No.]

File Name: LASTNAME_LAB[No.]_problem[No.].m

Date: [MM]/[DD]/[YY]

%}




%Delete an eventual pre-existing diary

delete xxx.txt




%Turn on a diary called mydiary.txt

diary xxx.txt




%clear screen

clc




%clear workspace

clear




disp('Your Name Here');

disp('');

disp('starting code: ');




%Completing lab x

%your source code here%




%Turn off the diary function

diary off

---------------------------------------------------------------------------------------------------------------------

Problem 1(10 points)

Display both the string “Hello World.” and the numeric value stored in variable x (x’s value is 173.0192) by using the built-in function named disp. An expected/sample output after executing this step is shown below:

Hello World.


------------------------------------------
The value of scalar variable x is:
------------------------------------------
173.0192








Problem 2(20 points)

5



a=




1
2
3



b=







4
5
6



c=







 

1
1
1
2
2
2
3
3
3



e=










Find
Find
Find
Find
Find
Find



PROBLEM 3(10 points)

Using what you have learned thus far:

Activate a diary of FIRSTNAME_LASTNAME_LAB2_problem3.txt in the script
Set up the vector from 0.4 (start value) to 5.0 (final value) by 0.01 (step increment)
Calculate
Turn off the diary






problem 4(20 points)

Activate a diary of FIRSTNAME_LASTNAME_LAB2_problem4.txt in the script
A food company manufactures five types of Trail mix packages using different mixtures of peanuts, almonds, walnuts, raisins, and M&Ms. The mixtures have the following compositions:


Mix 1
Mix 2
Mix 3
Mix 4
Mix 5
Peanuts (oz)
3
1
1
2
1
Almonds (oz)
1
2
1
3
1
Walnuts (oz)
1
1
0
3
3
Raisins (oz)
2
0
3
1
2
M&Ms (oz)
1
2
3
0
2
 

How many packages of each mix can be manufactured if of peanuts, of almonds, of walnuts, of raisins, and of M&Ms are available? Write a system of linear equations and solve in MATLAB.
Turn off the diary.
problem 5(20 points)

Activate a diary of FIRSTNAME_LASTNAME_LAB2_problem5.txt in the script
Enter and solve the following system of linear algebraic equations:
5x – 4y +6z = 37

11x +3y +3z = -5

5x + 6y +z = -3

Solve it by hand first and then solve it using MATLAB. Display using the command FPRINTF the values for x, y, and z. Make sure the values are clearly labeled.
Turn off the diary.
problem 6(20 points)

Activate a diary of FIRSTNAME_LASTNAME_LAB2_problem6.txt in the script
Using the INPUT command three times, ask the user to insert the values of A, D (enter values for both 0.75 < (A,D) < 3), and phi (, an angle measured in radians, between 0 and 2).
Set up the vector t from 0 (start value) to 3.0 (final value) by 0.03 (step increment)
Calculate v = . Note the equation on the left is not in MATLAB format. Display the value of v using the command FPRINTF.
Turn off the diary



SUBMITTING YOUR LAB:

Submit your lab by uploading .m files using the Blackboard Assignment feature no later than the date specified.