exercise2():
  Get a datafile in csv format from the class website.
  Read the data from the datafile.
  Print the first five lines.
  Make a histogram of some of the features.
  Compute some statistical measurements.
  Standardize the data, and recompute the statistics.
  When finished, delete the datafile.
  Downloading dataset file:

  "wine.csv" contains 177 rows and 14 columns.

  First five lines of data:

  (0)           1        13       1.8       2.1        11     1e+02       2.6       2.8      0.26       1.3       4.4       1.1       3.4   1.0e+03
  (1)           1        13       2.4       2.7        19     1e+02       2.8       3.2       0.3       2.8       5.7         1       3.2   1.2e+03
  (2)           1        14       1.9       2.5        17   1.1e+02       3.9       3.5      0.24       2.2       7.8      0.86       3.5   1.5e+03
  (3)           1        13       2.6       2.9        21   1.2e+02       2.8       2.7      0.39       1.8       4.3         1       2.9   7.4e+02
  (4)           1        14       1.8       2.5        15   1.1e+02       3.3       3.4      0.34         2       6.8       1.1       2.9   1.4e+03
  Graphics saved as 'exercise2.jpg'

  Statistics for data:

  Minimum            1        11      0.74       1.4        11        70      0.98      0.34      0.13      0.41       1.3      0.48       1.3   2.8e+02
  Maximum            3        15       5.8       3.2        30   1.6e+02       3.9       5.1      0.66       3.6        13       1.7         4   1.7e+03
  Range              2       3.8       5.1       1.9        19        92       2.9       4.7      0.53       3.2        12       1.2       2.7   1.4e+03
  Mean             1.9        13       2.3       2.4        20     1e+02       2.3         2      0.36       1.6       5.1      0.96       2.6   7.5e+02
  Variance         0.6      0.65       1.2     0.075        11     2e+02      0.39      0.99     0.015      0.32       5.4     0.052      0.49   9.9e+04
  RMS              7.4        46       9.2       8.5        70   3.6e+02       8.4         8       1.4         6        20       3.5       9.6   2.9e+03

  Statistics for normalized data:

  Minimum         -1.2      -2.4      -1.4      -3.7      -2.7      -2.1      -2.1      -1.7      -1.9      -2.1      -1.6      -2.1      -1.9      -1.5
  Maximum          1.4       2.3       3.1       3.1       3.2       4.4       2.5       3.1       2.4       3.5       3.4       3.3         2         3
  Range            2.6       4.7       4.5       6.8       5.8       6.5       4.6       4.8       4.3       5.6       5.1       5.4       3.9       4.5
  Mean          -8e-17  -5.2e-16   2.8e-16  -3.8e-16  -2.4e-16    -8e-17  -2.8e-16   1.6e-16    -6e-16    -4e-17   1.9e-16     6e-16   7.2e-16   1.6e-16
  Variance           1         1         1         1         1         1         1         1         1         1         1         1         1         1
  RMS              3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6       3.6

  Deleting dataset file:

exercise2:
  Normal end of execution.