Question

a) A step function has following characteristic 1for t > 0 -1 for t < 0 sgn(t) Use MATLAB plot this function over [-10, 10]. One display panel has two figures over two rows This is figure 1. It is displayed on top row of display panel. Give title; label x- and y- axes b) Plotting the Graph of a Sinc Function The sinc function is defined as sinx f(x) х whose value at x = 0 is sinx (sinx) COSX f(0) lim = 1 х' 1 x=0 x0 x=0 Plot the graph of this function over [-4t, 4n]. This is figure 2. It is displayed on bottom row of same panel In case any error occurred, fix it

Answer 1

a.

MATLAB CODE

clear all;
clc;
t=-10:0.01:10; % Time Vector
y=sign(t); % signum function

plot(t,y,'*'); % plot
grid on
title('Signum ');
xlabel('t (sec)')
ylabel('Amplitude');

- 0 Figure 1 File Edit View 0803 Insert Tools Desktop Window A & Signum Help E O Amplitude ------ -10 8 6 4 2 0 t(sec) 2 4 6 8 10

b.

MATLAB CODE

clear all ;
clc ;
x=-4*pi:0.1:4*pi ; %axis defination

y=sinc(x) ; %sin(pi*x)/(pi*x)
plot(x,y,'r'); %plot
grid on
title('Sinc Function');
xlabel('t in sec')
ylabel('Amplitude');

Figure 1 File Edit View Insert Tools Desktop Window Help ada Ans. 3 O E O Sinc Function Amplitude OMAAAA -0.2 0.15 10 5 10 t in sec