Table 9 Comparing the tree structures between trees from the descriptive forest and a single C4.5 tree
All trees are performed from the CVDs dataset | annotation | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
The details of comparisons | the single C4.5 tree | the {Oldpeak > 85}-tree | the {ChestPainType = ASY}-tree | the {ExerciseAngina = Y}-tree | the {ST_Slope = Flat}-tree | the {Sex = M}-tree | the {Sex = M, ChestPainType = ASY}-tree | the {Sex = M, ExerciseAngina = Y}-tree | the {Sex = M, ST_Slope = Flat}-tree | the descriptive forest | |
1. Tree size | 18 | 11 | 6 | 5 | 9 | 7 | 6 | 10 | 16 | 5–16 | excluded the boundary nodes |
2. Number of leaf nodes | 10 | 6 | 4 | 3 | 5 | 4 | 4 | 6 | 10 | 3–10 | |
3. Tree depth | 4 | 3 | 2 | 2 | 4 | 3 | 2 | 4 | 3 | 2–4 | excluded the boundary nodes |
4. Number of related instances | 918 | 423 | 496 | 371 | 460 | 1741 | 426 | 328 | 385 | 843 | |
5. Occurrence of the Age feature | - | - | - | - | - | - | - | - | 1 | 1 | |
6. Occurrence of the Sex feature | 1 | 1 | - | - | 1 | b | b | b | b | b,2 | b = boundary node |
7. Occurrence of the ChestPainType feature | - | - | b | - | - | b | b | - | 1 | b,1 | b = boundary node |
8. Occurrence of the RestingBP feature | 1 | - | - | - | 1 | - | - | - | - | 1 | |
9. Occurrence of the cholesterol feature | - | - | - | - | - | - | - | - | 2 | 2 | |
10. Occurrence of the FastingBS feature | 1 | - | - | - | 1 | 1 | - | 1 | - | 3 | |
11. Occurrence of the RestingECG feature | - | - | - | - | - | - | - | - | 1 | 1 | |
12. Occurrence of the MaxHR feature | - | 1 | - | 1 | - | - | - | 2 | 1 | 5 | |
13Occurrence of the ExerciseAngina feature | 2 | 2 | - | b | 1 | b | - | b | - | b,3 | b = boundary node |
Occurrence of the Oldpeak feature | 2 | b,1 | 1 | 1 | - | 1 | 1 | - | - | b,5 | b = boundary node |
15. Occurrence of the ST_Slope feature | r | - | 1 | - | b | b,1 | 1 | 1 | b | b,4 | r = root node, b = boundary node |