NET 222: Communications
And Networks
Fundamentals
Name:
Homework
2- MATLAB
ID:
Section:
Networks and communications
Department
Question 1:
Write the MATLAB statements for the following requirements:
1- Declare and add the following matrices:
A = [1 2 3 ; 7 8 9 ; 6 5 4]
0.25
B = [2 1 1 ; -4 22 -12 ; 2 8 9] 0.25
C = A + B 0.25
2- Find the complement of B.
B'
Define a vector of angels that start from 0 until 1 with a step of 0.3 between each two angels. Then get the
COSINE for these angels.
V = 0 : 0.3 : 1
S = cos(V)
Question 2:
1- Plot the function e-x/3sin(x) spaced over 0≤x≤4π .use 100 samples.
x=linspace(0,4*pi,100);
y=sin(x);
y1=exp(-x/3);
y2=y.*y1;
plot(x,y2) or plot(y2)
Note: use * Erorr (y2=y*y1;)
2- Create the following graph light intensity plot :
a) Creating vector x,y for plotting the theoretical curve.
x=[10:0.1:22];y=95000./x.^2;
b) Creating a vector with light intensity from data. xd=[10:2:22];yd=[950 640 460
340 250 180 140];
Question 3:
1. Sample the sinusoid x = sin(2 pi f t), where f = 2 kHz. And t=0:5T
•
Let x1 be the signal sampled at 10 kHz.
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Let x2 be the signal sampled at 3 kHz
Question 4:
1. Plot each function showing below on x=[0,7 pi] incremented by 0.1. Produce three plot
on the same figure and different colors:
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3 * sin(x) )
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0.75 * cos (x)
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x+sin(3pi/4 *x)
Note: Bonus one mark for those who will solve the homework correctly