code: def make_continuous(f, occlusion):
      non_occluded = 1 - occlusion
      num = (
          np.roll(f, 1, axis=0) * np.roll(non_occluded, 1, axis=0)
          + np.roll(f, -1, axis=0) * np.roll(non_occluded, -1, axis=0)
          + np.roll(f, 1, axis=1) * np.roll(non_occluded, 1, axis=1)
          + np.roll(f, -1, axis=1) * np.roll(non_occluded, -1, axis=1)
      )
      den = (
          np.roll(non_occluded, 1, axis=0)
          + np.roll(non_occluded, -1, axis=0)
          + np.roll(non_occluded, 1, axis=1)
          + np.roll(non_occluded, -1, axis=1)
      )
      return f * non_occluded + (1 - non_occluded) * num / (den + 0.001)
  
file_path: autograd/examples/fluidsim/wing.py
imports: from __future__ import absolute_import
  from __future__ import print_function
  from builtins import range
  import autograd.numpy
  from autograd import value_and_grad
  from scipy.optimize import minimize
  import matplotlib.pyplot
  import os
label_desc: Use image node_id 4 for calling a global function with example usage: make_continuous(f, occlusion) and returns: unknown