%GETSIZE Dataset size and number of classes%%  [M,K,C] = GETSIZE(A,DIM)%% INPUT%   A    Dataset%   DIM  1,2 or 3 : the number of the output argument to be returned%% OUTPUT%   M    Number of objects%   K    Number of features%   C    Number of classes%% DESCRIPTION% Returns size of the dataset A and the number of classes. C is determined% from the number of labels stored in A.LABLIST. If DIM = 1,2 or 3, just % one of these numbers is returned, e.g. C = GETSIZE(A,3).