About CAT arguments dimension are not consistent

Hello, guys, i face a problem, please help me~

clear all;

clc;

[x Fs]=wavread('PhoneNumberA_2013.wav');

N=length(x);

x=[x 0];

K =round([697 770 852 941 1209 1336 1407]*N/8000);

y=zeros(1,N);

for k=1:7

    v_1=0;

    v_2=0;

    v=0;

    for i=1:N+1

        v_2=v_1;

        v_1=v;

        v=2*cos(2*pi*k/N)*v_1-v_2+x(i);

    end

    y(K(k)) = v-exp(-j*2*pi*k/N)*v_1;

end

k=0:N-1;

stem(k,y)

The error information said Error using horzcat CAT arguments dimensions are not consistent. the specific error lies in x=[x 0]

I do not how to fix that, plz help me, thank you

[Jan]

A general comment: Avoid clear all.

Answer 1

[Azzi Abdelmalek]

If x is a column vector, you can t make an horizontal concatenation. Maybe you should do

 x=[x;0]