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""" 
Author: Oliver Mitevski

References:
A Generalized Linear Model for Principal Component Analysis of Binary Data, 
Andrew I. Schein; Lawrence K. Saul; Lyle H. Ungar

The code was translated and adapted from Jakob Verbeek's 
"Hidden Markov models and mixtures for Binary PCA" implementation in MATLAB

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class OnlineLearner(object):
    def __init__(self, **kwargs):
        self.last_misses = 0.
        self.iratio = 0.
        self.it = 1.
        self.l = kwargs["l"]
        self.max_ratio = -np.inf
        self.threshold = 500.

    def hinge_loss(self, vector, cls, weight):