Calls the ctmc.ctmc function

        Parameters
        ----------
        X : list of lists
            (see ctmc function 'data')

        y
            not used, present for API consistence purpose.

def fit(self, X, y=None):
        """Calls the ctmc.ctmc function

        Parameters
        ----------
        X : list of lists
            (see ctmc function 'data')

        y
            not used, present for API consistence purpose.
        """
        self.transmat, self.genmat, self.transcount, self.statetime = ctmc(
            X, self.numstates, self.transintv, self.toltime, self.debug)
        return self