How to make a histogram for matrix array

ind1 = 1:6;
for t2=1:length(mm_r)/6;
    if t2 <= 6
        wt_r = mm_r(1:361,1:361,ind1);
        wint2_r(:,:,t2) = mean(wt_r,3); %wint2_r is of size 361*361*6

          ind1 = ind1+6;
      else
          end      
  end

How can make a Histogram for each of the matrix of matrix array wint2_r