MATLAB: Remove some elements from a matrix but conserve the same struct

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i have the matrix
   x=[0 -1 0  5  10  5  0  0;
      0  0  5  10 20  10 5  0;
      1  -1 0  5  10  5  2  0;
      0  2  1  0  5   2  1  0;
      0  0  0  -10 0  0  0  0;]
i would like to "disappear" the values between -1 and 5 and keep the matrix with same struct but only the wanted values. the new matrix going to be something like this:
x=
   [           10          ;
            10 20 10       ;  
               10          ;
                           ;
          -10              ;]

Best Answer

You will have to use cell arrays if you want to preserve the shape:
X = num2cell(x);  % A cell array with the same shape as x.
X(x<=5 & x>=-1) = {[]}
Is there a practical reason for doing this? It seems like a large waste of memory to me. If you need to keep the indices viewable, you also could do this:
X = x;
X(x<=5 & x>=-1) = 0;
X = sparse(X)
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