class_docstr: Class used to plot points in the Poincare Half Plane.
class_docstr_tok: ["Class","used","to","plot","points","in","the","Poincare","Half","Plane","."]
docstr: Set axis.
docstr_tok: ["Set","axis","."]
code: def set_ax(self, ax=None):
      """Set axis."""
      if ax is None:
          ax = plt.subplot()
  
      plt.setp(ax, xlabel="X", ylabel="Y")
      return ax
  
imports: import matplotlib.pyplot
  from mpl_toolkits.mplot3d import Axes3D
  import geomstats.backend
  from geomstats.geometry.hyperboloid import Hyperboloid
  from geomstats.geometry.poincare_half_space import PoincareHalfSpace
label_desc: Use image node_id 3 for calling the PoincareHalfPlane obj's underlying member method code with example usage: obj.set_ax(ax) and returns: ax