metric.py 文件源码

def substitution_rate(Nref, Nsubstitutions, eps=numpy.spacing(1)):
    """Substitution rate

    Parameters
    ----------
    Nref : int >=0
        Number of entries in the reference

    Nsubstitutions : int >=0
        Number of substitutions

    eps : float
        eps
        (Default value=numpy.spacing(1))

    Returns
    -------
    substitution_rate: float
        Substitution rate

    """

    return float(Nsubstitutions / (Nref + eps))