code: def make_grid(x, y, h=0.02):
      x_min, x_max = x.min() - 1, x.max() + 1
      y_min, y_max = y.min() - 1, y.max() + 1
      xx, yy = np.meshgrid(
          np.arange(x_min, x_max, h), np.arange(y_min, y_max, h)
      )
      return xx, yy
  
file_path: DESlib/examples/plot_xor_example.py
imports: import matplotlib.pyplot
  import numpy
  from sklearn.ensemble import BaggingClassifier
  from sklearn.model_selection import train_test_split
  from sklearn.tree import DecisionTreeClassifier
  from deslib.dcs import LCA
  from deslib.dcs import MLA
  from deslib.dcs import OLA
  from deslib.dcs import MCB
  from deslib.dcs import Rank
  from deslib.des import DESKNN
  from deslib.des import KNORAE
  from deslib.des import KNORAU
  from deslib.des import KNOP
  from deslib.des import METADES
  from deslib.util.datasets import make_xor
label_desc: Use image node_id 3 for calling a global function with example usage: make_grid(x, y, h) and returns: xx,  yy