How can change my code without loop?

Hello all another way to do this without loop...this code slice the given matrix in matrices of size 256x13x13. after reshape the freshly cut saves the matrix in the matrix X. I wanted to know if you could do all this without looping.

    dim_cov=13;
    campioni=179; 
    data = randn(256,191, (dim_cov+1));
    for q=1:campioni
       X(:,:,q)=reshape(data(:,q+(1:dim_cov)-1,(1:dim_cov)),256,dim_cov*dim_cov);
    end

TNK AT ALL!!!!