Help with stem plotting

Hey I want to dis play my signal which has values from n=[0,101] only from n=[0,50] but when i try it tells me x must be the same length as y here is my code.

clc; close all;

z = conv(x,h);

figure(2)

stem(0:1:51, y, 'r -');

hold on

stem(0:1:101, z, 'bo ')

xlabel('n');

ylabel('z[n]');

title('z[n] vs y[n]');

legend('y[n]','z[n]')

[Greg]

Your y variable clearly doesn't have 52 elements in it. Or z doesn't have 102.

Without showing us your variables, how are we supposed to help?

Try running whos or size(y) or size(z).