Course Name: Computer
Programming
Course Code: (EE26324)
Semester: 1st 1446/1447
Group Number: ……………
University of Bisha
College of Engineering
Electrical Engineering Department
Student Name: …………………………
Lab #4
Date of Issue: 14/09/2024
ID Number: …………………………
Due Date of Submission: 7/10/2024
Notes: Student must do his homework independently and submit it within the allowable time.
Late submission is not accepted.
Cheating is considered a most serious offence, and we shall not hesitate to take the appropriate punitive actions according to the
severity of the offence committed and including expulsion from the program.
Question #1 (draw line graph using plot command)
a) Create a plot that connects the points with red color & dashed line, with circles as markers. The line
width is 2 points, and the size of the markers is 12 points. The markers have a blue edge line and
yellow filling.
X
1980
1985
1990
1995
2000
2005
2010
2015
2020
Y
8
12
20
22
18
24
27
15
21
The label for the X-axis is “ Time in Years ”
The label for the Y-axis is “ Population in Millions ”
The title of the plot is “Population Changes Every Five Years”
The plot must include a Grid and Legend.
b) Repeat the above plot but focus on the X-axis from 1990 to 2015, and the Y-axis from 18 to 27
Note:
Question 2: (Plot polynomials using plot & polyval commands)
Consider X as a vector starts at 0 and ends at 6 with increment 0.5
Consider Y as a vector = 3 X3 – 26 X + 6
Consider U as a vector = 9 X2 + 18
Consider V as a vector = 18 X
Draw the relation between X and Y, X and U, X and V.
 The first relation with blue color & solid line, with square as markers. The line width is 3 points, and
the size of the markers is 10 points. The markers have a black edge line and yellow filling.
 The second relation with green color & dash-dot line, with triangle pointed up as markers. The line
width is 3.5 points, and the size of the markers is 11 points. The markers have a blue edge line and
cyan filling.
 The third relation with magenta color & dotted line, with circles as markers. The line width is 3
points, and the size of the markers is 10 points. The markers have a red edge line and black filling.
Choose the proper label for the X-axis and Y-axis. The title of the plot is “Plotting three curves in one
figure”. The plot must include a Grid and Legend.
Write the MATLAB command to do this and give the screen shot of the MATLAB plot.
Computer Programming - EE26324
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Question 3: (Plot functions using fplot command)
Write the suitable MATLAB commands to plot the two curves (x and y) w.r.t. time (t) that starts
at t = 0 and ends at t = 8. Your plot must include labels, title, legend. Take:
𝒙(𝒕) = 𝟏𝟎 𝐞−𝟎.𝟓𝐭 𝐬𝐢𝐧(𝟑𝐭 + 𝟐)
, 𝒚(𝒕) = 𝟕 𝐞−𝟎.𝟒𝐭 𝐜𝐨𝐬(𝟓𝐭 − 𝟑)
Question 4: (Plot multiple graphs in the same figure using subplot command)
Given that:
X has 100 numbers between 0 & 2π
Y = sin X, Z = cos X, V= Y2 and W = Z2
We need to plot X versus Y & X versus Z & X versus V & X versus W.
Use MATLAB to plot the above four relations in same figure using the command subplot.
Give a screenshot of MATLAB code and MATLAB response.
Question 5: (bar plot using bar command)
a) Create a Vertical Bar plot that show the relation between the years (X) and population (Y) given below
X
Y
1980
8
1985
12
1990
20
1995
22
2000
18
2005
24
2010
27
2015
15
2020
21
The label for the X-axis is “ Time in Years ”. The label for the Y-axis is “ Population in Millions ”. The
title of the plot is “Population Every Five Years”.
Question 6: (3D plot using plot3 command)
Given that the time (t) has 1000 points between −10 and +10, and
𝑥(𝑡) = 𝑒 −𝑡/10 sin(5𝑡)
𝑦(𝑡) = 𝑒 −𝑡/10 cos(5𝑡)
Using MATLAB, draw a three-dimensional plot where time (t) is represented on Z axis, the
function x(t) is represented on X axis and the function y(t) is represented on Y axis. Give a
proper label to each axis.
Your answer must include a screenshot of MATLAB code and MATLAB response.
Question 7: (3D plot using surf command)
Given that the X-axis starts at 1 with increment 0.05 and ends at 10.
Similarly, the Y-axis starts at 1 with increment 0.1 and ends at 20.
The Z axis is defined by the function:
𝑍 = sin(𝑥) + cos(𝑦)
Draw the surface plot and give proper labels to the 3 axes and title for that plot.
Your answer must include a screenshot of MATLAB code and MATLAB response.
With Best Wishes
Computer Programming - EE26324
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