code: def test_von_mises_fisher_show():
      # Smoke test for VonMisesMixture.show
      x = np.random.randn(100, 3)
      x = (x.T / np.sqrt(np.sum(x**2, 1))).T
      vmd = VonMisesMixture(1, 1)
      # Need to estimate to avoid error in show
      vmd.estimate(x)
      # Check that show does not raise an error
      vmd.show(x)
  
file_path: nipy/nipy/algorithms/clustering/tests/test_vmm.py
imports: from unittest import skipIf
  import numpy
  from nibabel.optpkg import optional_package
  from ..von_mises_fisher_mixture import VonMisesMixture, select_vmm, select_vmm_cv, sphere_density
label_desc: Use image node_id 3 for calling a global function with example usage: test_von_mises_fisher_show() without return types