galpy.potential.Potential.Rzderiv
galpy.potential.Potential.rl
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NAME:
Rforce
PURPOSE:
evaluate radial force F_R (R,z)
INPUT:
R - Cylindrical Galactocentric radius z - vertical height phi - azimuth (optional) t - time (optional)
R - Cylindrical Galactocentric radius
z - vertical height
phi - azimuth (optional)
t - time (optional)
OUTPUT:
F_R (R,z,phi,t)
HISTORY:
2010-04-16 - Written - Bovy (NYU)