Matlab code for Computation of Linear convolution with DFT

Code:

clc;

clear all;

g=input('Type in the first sequence:');

h=input('Type in the second sequence:');

ga=[g zeros(1,length(h)-1)];

ha=[h zeros(1,length(g)-1)];

G=fft(ga);

H=fft(ha);

Y=G.*H;

y=ifft(Y);

subplot 411; stem(g); title('First sequence');

subplot 412; stem(h); title('second sequence');

subplot 413; stem(y); title('New sequence');

subplot 414; plot(y); title('New sequence');

Output: 

Type in the first sequence:[1 2 5]

Type in the second sequence:[ 6 7 8]