Question

1. Write an Octave script (lab02_01.m), perform the following operation.

   (a) Create two variable a1=5, a2=7;
   (a) Create a vector t from 0 to 2 with step size to 0.001;
   (b) Create a vector sig of a1sin(22t)+a2sin(24t);
   (c) Plot the vector sig vs t in a subplot region 1;

(d) Using For, While, if statement, perform the following operation
       (i) sig_2 = sig        if sig>0
       (ii) sig_2=-sig*2+1    if sig<0

   (e) Plot the vector sig_2 vs t in a subplot region 2;
   (f) Save the program to the file, “lab02_01.m”.

Answer 1

Octave Script :

Text :

clear all;
clc;
a1 = 5;
a2 = 7;
t = 0:0.001:2;
sig = a1*sin(22*t) + a2*sin(24*t);
subplot(211)
plot(t,sig)
title('Plot of sig')
xlabel('--> Time')
ylabel('--> Amplitude')

sig_2 = sig.*(sig>=0) - ((sig*2)+1).*(sig<=0);
subplot(212)
plot(t,sig_2);
title('Plot of sig_2')
xlabel('--> Time')
ylabel('--> Amplitude')

Plots :