%GETPRIOR Get class prior probabilities of dataset%%   [PRIOR,LABLIST] = GETPRIOR(A,WARNING)%% INPUT%   A        Dataset%   WARNING  1: Generate warning if priors are not set and should be%               computed from class frequencies (default)%   WARNING  0: Suppress warning message%% OUTPUT%   PRIOR    Class prior probabilities%   LABLIST  Label list%% DESCRIPTION% Returns the class prior probabilities as defined in the dataset A.% In LABLIST the corresponding class labels are returned.%% Note that if these are not set (A.PRIOR = []), the class frequencies% are measured and returned. Consequently, there is an essential difference% in the use of A.PRIOR, which returns the true contents of the field, and% GETPRIOR(A), which returns the interpretation for the empty A.PRIOR.%% If A has soft labels, these are used to estimate the class frequencies. % If A has target labels, an error is returned since in that case, no % classes are defined.%% SEE % DATASETS