galpy.df.streamdf.find_closest_trackpoint¶
-
streamdf.
find_closest_trackpoint
(R, vR, vT, z, vz, phi, interp=True, xy=False, usev=False)[source]¶ NAME:
find_closest_trackpointPURPOSE:
find the closest point on the stream track to a given pointINPUT:
R,vR,vT,z,vz,phi - phase-space coordinates of the given point
interp= (True), if True, return the index of the interpolated track
xy= (False) if True, input is X,Y,Z,vX,vY,vZ in Galactocentric rectangular coordinates; if xy, some coordinates may be missing (given as None) and they will not be used
usev= (False) if True, also use velocities to find the closest point
OUTPUT:
index into the track of the closest track pointHISTORY:
2013-12-04 - Written - Bovy (IAS)