Generates a 2-state model with lognormal emissions and frequency smoothing

def keystroke_model():
    """Generates a 2-state model with lognormal emissions and frequency smoothing"""
    model = Pohmm(n_hidden_states=2,
                  init_spread=2,
                  emissions=['lognormal', 'lognormal'],
                  smoothing='freq',
                  init_method='obs',
                  thresh=1)
    return model