def evaluateplanarPotentials(Pot,R,phi=None,t=0.,dR=0,dphi=0):
    """
    NAME:

       evaluateplanarPotentials

    PURPOSE:

       evaluate a (list of) planarPotential instance(s)

    INPUT:

       Pot - (list of) planarPotential instance(s)

       R - Cylindrical radius (can be Quantity)

       phi= azimuth (optional; can be Quantity)

       t= time (optional; can be Quantity)

       dR=, dphi= if set to non-zero integers, return the dR,dphi't derivative instead

    OUTPUT:

       Phi(R(,phi,t))

    HISTORY:

       2010-07-13 - Written - Bovy (NYU)

    """
    return _evaluateplanarPotentials(Pot,R,phi=phi,t=t,dR=dR,dphi=dphi)