to access the elements in the page wise of multidimensional matrix

my input data is

 ofdm_symbol=randn(8,10,2)+(1j*randn(8,10,2))

i have to access the of the input part by part and do zero padding for the input data i am using this data in for loop

 ii=2 
 time_domain_signal(:,:,ii)=abs(ifft([ofdm_symbol(:,1:4,ii) zeros(N,(L-1)*N,ii) ofdm_symbol(:,5:8,ii)]));

i am able access the elemnts of the 1st page but not able to access and assign them to the output. i am getting the error as

 "Subscripted assignment dimension mismatch".
 size(ofdm_symbol(:,1:4,ii))= 8x4 ;size(ofdm_symbol(:,5:8,ii)])=8x4 ,size(zeros(N,(L-1)*N,ii))=8x4

if i am using the parse of the code.

if i modify the code as

 time_domain_signal=abs(ifft([ofdm_symbol(:,1:4,ii) zeros(N,(L-1)*N,ii) ofdm_symbol(:,5:8,ii)]));

my dimensions are

 size(ofdm_symbol(:,1:4,ii))= 8x4 ;size(ofdm_symbol(:,5:8,ii)])=8x4 ,size(zeros(N,(L-1)*N,ii))=8x4x2

can any one help in obtaining the proper dimensions and accessing the elements page wise of multidimensional matrix

[Matt J]

How are you pre-allocating time_domain_signal(:,:,:)

[ABDUL]

i am not pre allocating the time_domain_signal.. i am directly allocating the computed values to the time_domain_signal

Answer 1

[Walter Roberson]

As I indicated before, you should not be passing ii into zeros(), you should be passing length(ii)

[ABDUL]

if i am using the length(ii) then i am able access the elements of the second page but i need to access the elements page by page in the multidimensional array.