MATLAB: Vertically concatenate a 2 column comma separated list

Question

I have a structure of size 100 extracted from regionprops called stat. Id like to extract the column of data that stores the centroids of each component. Since they are in a list, I tried

centroids = [stat(:).Centroid]';

but it gives me an array of size 200 meaning it doesnt concatenate properly. Then I tried

x = [stat(:).Centroid(1)];
y = [stat(:).Centroid(2)];

but I get an error "Scalar index required for this type of multi-level indexing". Id like the result to be an array of 100 rows and 2 columns. Can someone suggest what I can do ? This is so difficult.

Answer 1

[a, b] is the same as horzcat, [a; b] is the same as vertcat, so to obtain the result you want:

centroids = vertcat(stat.Centroid);