i m doing a project on digital watermarking in which i hav to divide a matrix in 2X4 submatrices. I m using the command mat2cell for this purpose but there is a problem in the execution of the command.

clc
clear all
X =imread('F:\M.TECH PROJECT\shri ram.jpg');
for i=1:111
    j=1:97;
     v(i,j) = 2;
end
v = v(i,j);
vsize=size(v)
for j=1:97
    i=1:111;
    w(i,j) = 7;
end
 w=w(i,j)';
 wsize=size(w)
 [rows,cols] = size(X)
 a=sum(v)
 b=sum(w)
 C = mat2cell(X,v,w);
% for i=1:rows
%     for j=1:cols
%         C{i,j}
%     end
% end

As per the rules of the command the dimensions of the matrix should be equal to the total no. of rows and columns of the submatrices, i have done it accordingly.

Still the command is not working.

[Walter Roberson]

Is it producing an error, or is just not dividing the matrix the way you want?

[Walter Roberson]

You should display size(X) -- it might not be the same as what you expect from your line [rows,cols] = size(X)