NAME:
sample
PURPOSE:
sample from the DF
INPUT:
n - number of points to return
returnaAdt= (False) if True, return (Omega,angle,dt)
returndT= (False) if True, also return the time since the star was stripped
interp= (object-wide default) use interpolation of the stream track
xy= (False) if True, return Galactocentric rectangular coordinates
lb= (False) if True, return Galactic l,b,d,vlos,pmll,pmbb coordinates
+Coordinate transformation inputs (all default to the instance-wide values):
Vnorm= circular velocity to normalize velocities with
Rnorm= Galactocentric radius to normalize positions with
R0= Galactocentric radius of the Sun (kpc)
Zsun= Sun’s height above the plane (kpc)
vsun= Sun’s motion in cylindrical coordinates (vR positive away from center)
OUTPUT:
(R,vR,vT,z,vz,phi) of points on the stream in 6,N array
HISTORY:
2013-12-22 - Written - Bovy (IAS)
