I use imfeature a lot (now regionprops). Since the output of imfeature(regionprops) is a structure I sometimes need to access the values of a feature for all blobs preferably in matrix form. I am not so sure if it can be done in one line but what I've discovered is a two step process.
Suppose a call to regionprops is made as follows:
stats = regionprops(L,'Area','MajorAxisLength','MinorAxisLength');
The first step is to convert the structure into a cell:
c = struct2cell(stats);
Then the cell is converted into a matrix:
m = cell2mat(c);
m now would have the same number of rows as features and columns would be as many as the number of blobs processed.
