code: def sigmoid(x):
      return 0.5 * (np.tanh(x) + 1.0)
  
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 5 for calling a global function with example usage: sigmoid(x) and returns: unknown