Question

This problem corresponds to 3.17 in text.

Consider the MATLAB script

tmin = -3;
tmax = 5;
dt = 0.0001;
t = tmin:dt:tmax;
sign0 = -1;
ind_p1 = >=0&t=1;
ind_p2 = >=0 & t<2;
ind_p3 = t>=-1&t< 0;
ind_p4 = >=0&t<3;
ind_p5 = t>=3&t< 4;
ind_p6 = t>=1 &t <2;
ind_p7 = t>=0 &t <10;
ind_p8 = t>-10 & t<=0;
s_out = ind_p1 + sign0 ind_p6;
plot(t,s_out);
ymin = min(s_out)*1.1;
ymax = max(s_out) 1.1;
axis([tmin, tmax, ymin,ymax]);

The MATLAB script above will generate which of the signals su(t) through so(t) in Problem 2.52, page 101 in the text?
Enter letter of answer _____
A. s₇ (t)
B. s₅ (t)
C. s₆ (t)
D. s₈ (t)
E. s₉ (t)
F. s₄ (t)
G. None of above

Answer 1

The MATLAB script provided generates the signal s₇ (t) described in Problem 2.52, page 101 in the text.

Step-by-step explanation:

The MATLAB script provided generates the signal s₇ (t) described in Problem 2.52, page 101 in the text. To understand why, let's break down the script step by step:

1. The script defines the time range and time step.
2. The script defines several logical arrays (ind_p1, ind_p2, etc.) that specify different time intervals. These intervals correspond to the conditions given in the problem.
3. The script combines these logical arrays to create the final logical array s_out, which marks the time intervals where the signal is active.
4. The script plots the signal using the time array and the s_out array.

Based on the conditions given, the signal s₇ (t) is the correct answer. Therefore, the answer is A. s₇ (t).