A question in the light of 'Cell contents assignment to a non-cell array object' error

Hello,

In my code, I am using the following constructs to create three cell arrays, using the following lines:

function result = creatematrixarray (narrays, arraysz)
     result = cell(1, narrays);
        for i = 1 : narrays
            result{i} = zeros(arraysz);   
        end
    end

Now, I am creating a sort of hierarchy in terms of an array A , an array B of arrays A, and another array C of arrays B. The reason for doing so is to numerically emulate a certain problem that I am researching on at the moment. So here is the code that I have written to create the hierarchy:

narrays = 3;
arraysz = [10,26];
array1 = creatematrixarray (narrays, arraysz);

narrays = 10;
arraysz = [3,10,26]; % this I believe would give me ten instances of the previous array
array2 = creatematrixarray (narrays, arraysz);

narrays = 10;
arraysz = [10,3,10,26]; % this I believe would again give me ten instances of the previous array
array3 = creatematrixarray (narrays, arraysz);

Now I am passing and returning array2 to and from a function, which is supposed to write to all the instances of array1 within array2, from columns 1-4, and all the 10 rows

And the syntax I am using to do this within the function is something like this:

for j = 1:10
                         for k = 1:3 % for array 1 dimensions
                             % for data       
                                for i=1:10
                                    switch i
                                        case 1
                                            array2{j} {k}(i,i) = i * 10;

And precisely at the last line I get the 'Cell contents assignment to a non-cell array object' error. I am not sure about where I have made a mistake-is it in the way I have created the hierarchy or is it in the way I am trying to access and write to a certain location within array 1 inside array2?

I would greatly appreciate your thoughts.

TIA

Vinod