How can I merge 4*4 cell arrays to form a 256*256 cell array?

Actually I took a plaintext image,converted that to 8 bit binary and then did DNA mapping. After that i splitted that into 4*4 cell arrays(each element of that cell looks like 'ATCG' or something ) and did some operation. Now I want to merge all those cells to get the final 256*256 cell?

[Image Analyst]

In what form to you have all these 4x4 cell arrays? Hopefully they're not 64x64 = 4096 separately named individual call array variables. Or is each 4x4 cell array itself inside a single cell of a 64x64 cell array?

Does each of the 16 cells in your 4x4 cell array have one 4 character long string in it, so you have 16 strings total in the cell array?

If all this sounds like gibberish to you then review the FAQ http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

[SMRITI]

see i converted the 256*256 decimal pixel values of an image to 8 bit binary.Then mapped each of 2 bits to 4 DNA code (A,T,C,G). Finally i got a DNA cell of 256*256. Now i converted that to 4*4 cell as:

M=4;
d=M*ones(256/4, 1);
small_mat1=mat2cell(plaintext_dna,d',d');

I did other addition or shuffling on these small_mat1{:}. Now i want to recombine all these again to get 256*256 cell.

[Image Analyst]

I don't really understand what you're saying. Perhaps give an example with actual numerical or character values, with smaller numbers than 256x256 though.

[SMRITI]

a=imread('cameraman.tif');

%converting decimal matrix to binary

for i=1:1:256

      for j=1:1:256
          b{i,j,1} = dec2bin(a1(i,j),8);
      end
  end 
  %disp(b)
  %DNA coding of plaintext image
  plaintext_dna = bin2DNA(b);
  size(plaintext_dna);
  %----------------------------------------------------------
  %STEP 2:
  %DIVIDE PLAINTEXT DNA INTO SMALL BLOCKS OF 4*4
  %---------------------------------------------------------
  K=4;
  c=K*ones(256/4, 1);
  small_mat=mat2cell(plaintext_dna,c',c');
  %size(small_mat);
  %______________
  %NOW I WANT TO MERGE small_mat to get back  plaintext_dna........

[SMRITI]

      function [ DNA_matrix] = bin2DNA( bin_matrix )

codebook = containers.Map({'00','11','10','01'},{'A','T','G','C'}); %// Lookup
outputCell = cellfun(@(x) values(codebook, {x(1:2),x(3:4),x(5:6),x(7:8)}), ...
             bin_matrix, 'uni', 0);
DNA_matrix = cellfun(@cell2mat, outputCell, 'uni', 0);

    end

Answer 1

[Walter Roberson]

cell256 = [small_mat1{1}, small_mat1{3}; small_mat1{2}; small_mat1{4}];

[SMRITI]

This doesn't work

Answer 2

[Matt J]

 C=arrayfun(@(i) vertcat(small_mat{:,i}),1:64,'uni',0);

   merged=[C{:}];