def __init__(self, cs=1.0, cinf=1.0, type='mean'):
    self.cs = cs
    self.cinf = cinf
    self.type = type
    self.xx = None
    self.yy = None
    self.zw = None
    self.ww = None
    self.nn = None
    self.varw = None
    self.Z = None
    self.CZ = None
    self._x = None
    self._y = None
    self._z = None
    self._w = None
    self._II = None
    self._idx = None
    self._jdx = None
    self._I = None
def __init__(self, cs=1.0, cinf=1.0, type='mean'):
    self.cs = cs
    self.cinf = cinf
    self.type = type
    self.xx = None
    self.yy = None
    self.zw = None
    self.ww = None
    self.nn = None
    self.varw = None
    self.Z = None
    self.CZ = None
    self._x = None
    self._y = None
    self._z = None
    self._w = None
    self._II = None
    self._idx = None
    self._jdx = None
    self._I = None