galpy.potential.Potential.R2deriv
galpy.potential.Potential.Rforce
Potential.
Rzderiv
NAME:
PURPOSE:
evaluate the mixed R,z derivative
INPUT:
R - Galactocentric radius Z - vertical height phi - Galactocentric azimuth t - time
R - Galactocentric radius
Z - vertical height
phi - Galactocentric azimuth
t - time
OUTPUT:
d2phi/dz/dR
HISTORY:
2013-08-26 - Written - Bovy (IAS)