How do I store the follwoing in 2d array

In the code given below, I want to store cent as a 2D array, so that I can find the mean of X and Y co=ordinates. But,its getting stored as an 1D array.How can I store it as a 2d? Reshape does'nt work because the values are irregular, as in they are real-time inputs

part of the code: for object = 1:length(stats) bb = stats(object).BoundingBox; bc = stats(object).Centroid; rectangle('Position',bb,'EdgeColor','r','LineWidth',2) cent = [stats.Centroid]; ///////GETS STORED AS AN 1D plot(bc(1),bc(2), '-m+')