text: # -*- coding: utf-8 -*-
  """
  Choosing the thumbnail figure
  =============================
  
  This example demonstrates how to choose the figure that is displayed as the
  thumbnail, if the example generates more than one figure. This is done by
  specifying the keyword-value pair
  ``sphinx_gallery_thumbnail_number = <fig number>`` as a
  comment somewhere below the docstring in the example file. In this example, we
  specify that we wish for the second figure to be the thumbnail.
  """
  
  # Code source: Óscar Nájera
  # License: BSD 3 clause
  
  import numpy as np
  import matplotlib.pyplot as plt
  
  
  def main():
      x = np.linspace(-1, 2, 100)
      y = np.exp(x)
  
      plt.figure()
      plt.plot(x, y)
      plt.xlabel('$x$')
      plt.ylabel('$\exp(x)$')
  
      # The next line sets the thumbnail for the second figure in the gallery
      # (plot with negative exponential in orange)
      # sphinx_gallery_thumbnail_number = 2
      plt.figure()
      plt.plot(x, -np.exp(-x), color='orange', linewidth=4)
      plt.xlabel('$x$')
      plt.ylabel('$-\exp(-x)$')
      # To avoid matplotlib text output
      plt.show()
  
  
  if __name__ == '__main__':
      main()
  