galpy.df.streamdf.meanangledAngle¶
- streamdf.meanangledAngle(dangle, smallest=False)[source]¶
NAME:
meanangledAngle
PURPOSE:
calculate the mean perpendicular angle at a given angle
INPUT:
dangle - angle offset along the stream
smallest= (False) calculate for smallest eigenvalue direction rather than for middle
OUTPUT:
mean perpendicular angle
HISTORY:
2013-12-06 - Written - Bovy (IAS)