content: import unittest
  
  import matplotlib
  
  matplotlib.use("Agg")
  
  
  class Test(unittest.TestCase):
      def test_random(self):
          import numpy as np
          import matplotlib.pyplot as plt
  
          from smt.sampling_methods import Random
  
          xlimits = np.array([[0.0, 4.0], [0.0, 3.0]])
          sampling = Random(xlimits=xlimits)
  
          num = 50
          x = sampling(num)
  
          print(x.shape)
  
          plt.plot(x[:, 0], x[:, 1], "o")
          plt.xlabel("x")
          plt.ylabel("y")
          plt.show()
  
      def test_lhs(self):
          import numpy as np
          import matplotlib.pyplot as plt
  
          from smt.sampling_methods import LHS
  
          xlimits = np.array([[0.0, 4.0], [0.0, 3.0]])
          sampling = LHS(xlimits=xlimits)
  
          num = 50
          x = sampling(num)
  
          print(x.shape)
  
          plt.plot(x[:, 0], x[:, 1], "o")
          plt.xlabel("x")
          plt.ylabel("y")
          plt.show()
  
      def test_full_factorial(self):
          import numpy as np
          import matplotlib.pyplot as plt
  
          from smt.sampling_methods import FullFactorial
  
          xlimits = np.array([[0.0, 4.0], [0.0, 3.0]])
          sampling = FullFactorial(xlimits=xlimits)
  
          num = 50
          x = sampling(num)
  
          print(x.shape)
  
          plt.plot(x[:, 0], x[:, 1], "o")
          plt.xlabel("x")
          plt.ylabel("y")
          plt.show()
  
  
  if __name__ == "__main__":
      unittest.main()
  