ENED 1091:
Engineering Models II
Homework Assignment #1
SOLUTIONS
Problem 1:
Array Indexing
For this problem, you will need to download the HW7.mat file from Blackboard.
Drop it in your
current MATLAB folder then type:
load HW7
at the MATLAB command prompt.
You
should now have the following three variables (x, y, and M) in your workspace with the values
shown below.
Don’t make any m
odifications to these variables.
x = 4
5
-1
5
3
-2
0
2
5
5
-1
5
5
3
4
y = -1
5
5
4
5
3
-2
4
5
3
4
3
1
3 -1
M =
2
2
3
2
-4
-5
-2
7
3
0
-2
5
-3
-2
5
-5
-5
0
2
-2
-4
-1
-1
2
1
4
-1
2
-4
-3
For all parts of this problem, don’t put a semicolon at the end of your command
so you can
copy the results as well as your MATLAB command.
a)
What MATLAB command will pull out entries 7 thru 12 in vector, x, and store them in a
vector called a?
Command and Results:
>> a = x(7:12)
a =
0
2
5
5
-1
5
b)
What MATLAB command will pull out every other entry of the vector, x, starting at entry 4
and ending at entry 12 and store these entries in a vector called b?
Command and Results:
>> b = x(4:2:12)
b =
5
-2
2
5
5
c)
What MATLAB command will pull out the7 in matrix, M, and store it in a scalar variable
called c?
Command and Results:
>> c = M(2,3)
c =
7

This ** preview** has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*