galpy.potential.evaluateR2derivs

galpy.potential.evaluateR2derivs(R, z, Pot, phi=0.0, t=0.0)

NAME:

evaluateR2derivs

PURPOSE:

convenience function to evaluate a possible sum of potentials

INPUT:

R - cylindrical Galactocentric distance

z - distance above the plane

Pot - a potential or list of potentials

phi - azimuth (optional)

t - time (optional)

OUTPUT:

d2Phi/d2R(R,z,phi,t)

HISTORY:

2012-07-25 - Written - Bovy (IAS)