code: def hx(x):
      """returns slant range based on downrange distance and altitude"""
  
      return (x[0] ** 2 + x[2] ** 2) ** 0.5
  
file_path: filterpy/filterpy/examples/RadarUKF.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import numpy
  import scipy.linalg
  import matplotlib.pyplot
  from GetRadar import get_radar
  from filterpy.kalman import UnscentedKalmanFilter
  from filterpy.common import Q_discrete_white_noise
label_desc: Use image node_id 2 for calling a global function with example usage: hx(x) and returns: unknown