Error using plot Vectors must be the same length

I want to correlate the signals x1 and y and plot it for the range n=0:59; but when I run the following code it gives error: Error using plot

Vectors must be the same length.

n=0:59;

x=[1 1 1 1 1 -1 -1 1 1 -1 1 -1 1 ];

x=[x, zeros(1, length(n) - length(x))];

x1=x.^n;

subplot 221

stem(n,x1)

n1=20:79;

x2=0.9*(x1.^n1);

y=imnoise(x2,'gaussian');

subplot 222

stem(n,y)

z=xcorr(x1,y);

subplot 223

stem(n,z)

I have tried solving the problem but had no luck whatsoever. Any help would be appreciated.

Answer 1

[Star Strider]

One option is to plot ‘z’ as a function of the lags xcorr computes:

[z,lags] = xcorr(x1,y);
subplot 223
stem(lags,z)