code: def bench3(x):
      """A benchmark function for test purposes.
  
          f(x) = sin(5*x) * (1 - tanh(x ** 2))
  
      It has a global minima with f(x*) ~= -0.9 at x* ~= -0.3.
      """
      return np.sin(5 * x[0]) * (1 - np.tanh(x[0] ** 2))
  
file_path: guildai/guild/_skopt/benchmarks.py
imports: import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: bench3(x) and returns: unknown