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Decision tree for tablet tensile strength (reprinted
from Shao et al., 2007a; with permission from
Elsevier)
Figure 5.8
Figure 5.9 represents the decision tree of tablet disintegration
time and its interpretation is similar to the previous tree. Decision
trees for other tablet properties can be found in the original article
(Shao et al., 2007a).
This study demonstrated that decision trees are capable
of successfully generating knowledge regarding cause-effect
relationships hidden in the experimental data. This knowledge
provides an improved understanding of tablet formulation.
The study was continued by development of so-called model
trees (Shao et al., 2007b). Model trees (Quinlan, 1992) are
able to generate automatically mathematical equations, which
map patterns hidden in an experimental data base. A model
tree is generated in two stages. The fi rst stage builds an ordinary
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