Building Data Mining Tools Using JDM - Java Data Mining: Strategy, Standard, and Practice - page 355

are retrieved and stored in the associated member variables. The
DME will not produce statistics if the attribute type is not compatible, hence
the result will be NULL. The code updating the Swing TableModels
used to show the collected information is contained in updateDis-
creteStatistics and updateNumericalStatistics that will be detailed later
in the chapter.
The following code shows how the tool example obtains this
information on distributions of numerical attributes.

1. private void updateNumericalStatistics() {
2. ((AbstractTableModel) mNumericalQuantileTable.getModel()).

3. fireTableDataChanged();

if (mSelectedNumericalStatistics null) {

4.

5. mNumericalMinLabel.setText("");

6. mNumericalMaxLabel.setText("");

7. mNumericalMeanLabel.setText("");

8. mNumericalMedianLabel.setText("");

9. mNumericalStandardDeviationLabel.setText("");

10. mNumericalVarianceLabel.setText("");

11. mNumericalInterQuartileRangeLabel.setText("");

12. return;

13. }

NumberFormat lFormat NumberFormat.getNumberInstance();

14.

15. lFormat.setGroupingUsed(false);

double lMinValue mSelectedNumericalStatistics.getMinimumValue();

16.

17. mNumericalMinLabel.setText(lFormat.format(lMinValue));

double lMaxValue mSelectedNumericalStatistics.getMaximumValue();

18.

19. mNumericalMaxLabel.setText(lFormat.format(lMaxValue));

double lMeanValue mSelectedNumericalStatistics.getMeanValue();

20.

21. mNumericalMeanLabel.setText(lFormat.format(lMeanValue));

double lMedianValue mSelectedNumericalStatistics.getMedianValue();

22.

23. mNumericalMedianLabel.setText(lFormat.format(lMedianValue));

double lVariance mSelectedNumericalStatistics.getVariance();

24.

25. mNumericalVarianceLabel.setText(lFormat.format(lVariance));

double lInterQuantileRange

26.

27. mSelectedNumericalStatistics.getInterQuartileRange();

28. mNumericalInterQuartileRangeLabel.setText(

29. lFormat.format(lInterQuantileRange));

double lStandardDeviation

30.

31. mSelectedNumericalStatistics.getStandardDeviation();

32. mNumericalStandardDeviationLabel.setText(

33. lFormat.format(lStandardDeviation));

double lRange lMaxValue lMinValue;

34.

double lMeanPercent (lMeanValue lMinValue) / lRange;

35.

double lMedianPercent (lMedianValue lMinValue) / lRange;

36.

37. mNumericalMeanSlider.setModel(

38. new DefaultBoundedRangeModel((int)(lMeanPercent * 100),

39. 1, 0, 100));

40. if (lMedianValue > lMinValue && lMedianValue < lMaxValue)