error in storing variable

I an performing dualtree transform,i have completed dual tree performed some operation and i have 10 matrices in each variable,now i f

for j = 1:J

      for s1 = 1:2
          for s2 = 1:3
           a1{j}{s1}{s2}=a1;

              end
      end
  end

if i use a1{j}{s1}{s2} i get error as

Cell contents assignment to a non-cell array object.

Error in ==> ssample at 35
         a1{j}{s1}{s2}=a1;

if i use

w1{j}{s1}{s2}=a1;

the size of a1 is {1x2} {1x2},w1 is {1x2}

if i use

w{j}{s1}{s2}=a1;

i get correct answer as

{1x2} {1x2}

i want to store in different variables in order to perform idualtree ,please help

[Jan]

Are you really sure, that you need a cell of cells of cells? This is possible, but not common. Would a [j, s1, s2} cell satisfy your needs?

Answer 1

[Walter Roberson]

Examine

a1{j}{s1}{s2}=a1

Notice that you have the same variable name on the left and right hand side, so you are attempting to store a copy of the entire cell array into an element of the cell array. Are you sure that is what you want?

[kash]

walter can u tell why i get error if i store in another variable i have to store in another variable because i have to process inverse dualtree,i want to store in another variable,cecause i have 10 matrices and i need ti display 10 images

[Walter Roberson]

In what you described in your Question, you get the error when you try to store a1 in to part of a1, and you do not get the error when you store a1 in to part of some other variable. That is the opposite of what you describe now, in which you say you get an error if you "store in another variable".

At least one of us is confused.