LAB - 2

1. Write a program(s) that takes in a time interval t, a frequency from the user and

plots:

a) (t)

b) u(t)

c) u(t-5)

d) 2*u(t)-1

e) sin( *t) , sin( *3*t) , sin( *t/3) all in the same plot using different colours.

f) sin( *t) , (1/3)*sin(3* *t) , (1/5)*sin(5* *t) individually and then their sum

in the same figure window as separate plots.

What do you observe in the sum of the three?

g) A random signal over the time interval t (explore rand command)

h) For the parts b), c), d) and e) first plot the signals in continuous form and then in discrete

form.(explore stem command)

2. Plot the following signal:

The last section on RHS is a time shifted exponentially decaying signal e-t.