ENGR112 HW2 Arrays Plotting.pdf - Week 2 Homework Name:...

Week 2 Homework ENGR 112 Arrays and plotting
Name: Guanyun Qiao Lab Time
(ECampus write “ECampus”)
: W 1000
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6
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Week 2 Homework ENGR 112 Arrays and plotting
Learning Objectives:
You should accomplish the following:
• Understand how to create arrays, calculate with them, and extract data from them.
• Plot the results of calculations.
• Be able to split up plots into multiple windows
• Plot multiple things in the same window with different colors and attributes.
Homework Guidelines:
1) Use example scripts from online for help plotting and vectors.
2) Save scripts as “HW2Script1.m” for problem 1, “HW2Script2.m” for problem 2, etc.
Specific Coding Notes:
Plotting – Label axes (with units when known), use titles, and use legend when plotting more
than one thing on a graph.
Example:
☹ " # $ NO ☹ " # $ ࠽? ’ ( ) * YES ࠽? ’ ( ) *
Warnings and Errors – You may see orange and red bars on the right-hand side of the editor.
Orange bars are warnings and red bars are errors. Hovering with the cursor over a par will show
you the problem.
Example:

Week 2 Homework ENGR 112 Arrays and plotting
Grading Checkpoints
Criteria Component No Yes
[30%] Comments and
Pseudocode
Declared units on all variables? X
English description of problem at top? X
Comments outlining your steps? X
[20%] Output formatting Used fprintf() to make complete sentences
(when required)?
X
Correct units on answers? X
Correct number of decimal places? X
Proper labels on graphs/plots? X
[50%] Functionality Script computes/plots correct value(s)? X
Did you use the correct ranges for input
variables?
X

Week 2 Homework ENGR 112 Arrays and plotting
Problem 1
a) Plot the following mathematical function in the domain -10 ≤ t ≤ 7 in increments of 0.004.
Assume that the x-axis is time measured in seconds, and the y-axis is distance measured
in meters. Print the minimum and maximum values of y for that range of ts, and the t-
values that produce the minimum and maximum values. Label the axes with time in
seconds (t) and distance in meters (y).
a. Hint: Look up the different versions of the function min/max.
b) Check the minimum value against the analytic solution (hint: minimum and maximum
values occur when the derivative is zero).