cross-correlation of two discrete sequence using conv in matlab

First we will find convolution of two discrete signals and then crosscorrelation of two signals using conv and xcorr function.
MATLAB Code:

clc;
a=[2 3 1];
b=[1 2 3];
c=conv(a,b);
m=length(c)-1;
n=0:1:m;
subplot(3,1,1);
stem(n,c);
xlabel('n');
ylabel('c');
title('convolution of two discrete sequence using conv function');
x=[1 2 3];
y=[1 2 3];
n1=length(y)-1;
n2=length(x)-1;
r1=conv(x,fliplr(y));
r=xcorr(x,y);
k=-n1:n2;
subplot(3,1,2);
stem(k,r);
xlabel('k');
ylabel('r');
title('cross-correlation of two discrete sequence using conv and xcorr function');
subplot(3,1,3);
stem(k,r1);



Output: