def has_na(eqdata):
    """
    Return false if `eqdata` contains no missing values.

    Parameters
    ----------
    eqdata : DataFrame or ndarray
        Data to check for missing values (NaN, None)

    Returns
    ----------
    answer : bool
        False iff `eqdata` contains no missing values.
    """
    if isinstance(eqdata, pd.DataFrame):
        _values = eqdata.values
    else:
        _values = eqdata
    return len(_values[pd.isnull(_values)]) > 0