logistic power

    Parameters
    ----------
    x: int
    a: float
    b: float
    c: float

    Returns
    -------
    float
        a/(1.+(x/np.exp(b))**c)

def log_power(x, a, b, c):
    """"logistic power

    Parameters
    ----------
    x: int
    a: float
    b: float
    c: float

    Returns
    -------
    float
        a/(1.+(x/np.exp(b))**c)
    """
    return a/(1.+(x/np.exp(b))**c)