How do i get periodic decaying impulse function using combination of sine and exponential functions

clc

clear all

n=1:1:5000;%1000 no of data points

fs=1000;%sampling frequency 0f 1000Hz

delt=1/fs;%sampling time interval

f=77;%frequency signal

t=n*delt;%time in seconds

totaltime=1000*delt;%length of time signal

y1=sin(pi*t);%77 Hz sine wave signal

for i = 1:77

if i<2

x=0.001:delt:(1/f);

y2=exp(-x)

else

x=((i-1)/f):delt:(i/f);

y2=exp(-x)

end

end

Answer 1

[KALYAN ACHARJYA]

I didnot go through your code, just read the title of the questions-

i get periodic decaying impulse function using combination of sine and exponential functions

t=0:.01:10;
A=20;
y1=A*sin(30.*t) 
%Change  ^the value as per requiremnet 
y2=-exp(-2*t);
%........^
result=y1.*y2;
plot(t,result);