/usr/lib/python3/dist-packages/scipy/__init__.py:146: UserWarning: A NumPy version >=1.17.3 and <1.25.0 is required for this version of SciPy (detected version 1.26.4
  warnings.warn(f"A NumPy version >={np_minversion} and <{np_maxversion}"
exercise3():
  Process the Ruspini data.

  "ruspini_data.txt" contains 75 rows and 2 columns.

  First five lines of data:

[[ 4. 53.]
 [ 5. 63.]
 [10. 59.]
 [ 9. 77.]
 [13. 49.]]

  Statistics for data:

    data.shape:      (75, 2)
    np.min(data,axis=0):   [4. 4.]
    np.mean(data,axis=0):  [54.88       92.02666667]
    np.max(data,axis=0):   [117. 156.]
    np.std(data,axis=0):   [30.29849721 48.37684662]
    np.var(data,axis=0):   [ 917.99893333 2340.31928889]
  Graphics saved as "exercise3.png"

  k  Energy

  1  150
  2  75.453
  3  40.0436
  4  10.2241
  5  8.61865
  6  7.65235
  7  4.7641
  8  4.39902
  9  3.47476
  10  3.26467
  Graphics saved as "exercise3_inertia.png"
  Graphics saved as "exercise3_clusters.png"

exercise3():
  Normal end of execution.