Get class prior probabilities of dataset
[PRIOR,LABLIST] = GETPRIOR(A,WARNING)
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. Use ISEMPTY(A,'prior') to test whether 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.