'IGTREE is a supervised learning method
where training data is represented as a tree ordered by information gain.
A feature is taken to occur in a vector (1) or not (0), i.e. BINARY weight.'

def __init__(self, train=[], baseline=MAJORITY, method=GAINRATIO, **kwargs):

    self._root = None
    self._method = method
    Classifier.__init__(self, train, baseline)
