Error Matlab code

Question

I code about subband coding, and delay signal My code:

N = 18; %Setting the filter length
[h0,h1,g0,g1] = firpr2chfb(N-1,0.4); % MATLAB function for the analysis/synthesis       
num=20000;
[x,fs,nbits] = wavread('sub1.wav',num);
% Analysis part
% Level 1
x0 = filter(h0,1,x); % Lowpass filtering
x1 = filter(h1,1,x); % Highpass filtering 
v0 = downsample(x0,2); % Down-sampling, signal component v_0[n]
v1= downsample(x1,2); % Down-sampling, signal component v_1[n]
% Level 2
x2= v0; % Selecting the lowpass output from Level for the input to Level 
x02 = filter(h0,1,x2); % Lowpass filtering
x12 = filter(h1,1,x2); % Lowpass filtering
v02= downsample(x02,2); % Down-sampling
v12= downsample(x12,2); % Down-sampling
v2= v12; % Signal component v_2[n]
% Level 3
x3= v02; % Selecting the lowpass output from Level for the input to Level 
x03 = filter(h0,1,x3); % Lowpass filtering
x13 = filter(h1,1,x3); % Highpass filtering
v03= downsample(x03,2); % Down-sampling
v13= downsample(x13,2); % Down-sampling
v3= v13; % Signal component v_3[n]
w13= [zeros(size(1:N-1)) v3(1:length(v3)-(N-1))]

But I receive a error

Error in ==> octavesubband at 40 w13= [zeros(size(1:N-1))v3(1:length(v3)-(N-1))]; %Inserting the delay z^(-(N-))

I don't know fix it. Please help me. Thanks

Rasman · Accepted Answer · 2013-05-10 04:21:47Z

1

well it starts by looking at the size of the array you are trying to concatenate:

>> size(v3(1:length(v3)-(N-1)))

ans =

        2483           1

>> size(zeros(size(1:N-1)))

ans =

     1    17

Which suggest you need to transpose one of them:

w13= [zeros(size(1:N-1))'; v3(1:length(v3)-(N-1))];

or

w13= [zeros(size(1:N-1)) v3(1:length(v3)-(N-1))'];

answered May 10, 2013 at 4:21

Rasman

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