galpy.potential.Potential.Rzderiv

Potential.Rzderiv(R, z, phi=0.0, t=0.0)

NAME:

Rzderiv

PURPOSE:

evaluate the mixed R,z derivative

INPUT:

R - Galactocentric radius (can be Quantity)

Z - vertical height (can be Quantity)

phi - Galactocentric azimuth (can be Quantity)

t - time (can be Quantity)

OUTPUT:

d2phi/dz/dR

HISTORY:

2013-08-26 - Written - Bovy (IAS)