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the value of flight time is the number of minutes from departure to arrival.
Selecting the attributes that can appear in classifiers
An optional final entry in the names file affects the way that See5 constructs classifiers. This entry
takes one of the forms
attributes included:
attributes excluded:
followed by a comma-separated list of attribute names. The first form restricts the attributes used
in classifiers to those specifically named; the second form specifies that classifiers must not use
any of the named attributes.
Excluding an attribute from classifiers is not the same as ignoring the attribute (see `ignore'
above). As an example, suppose that numeric attributes A and B are defined in the data, but
background knowledge suggests that only their difference is important. The names file might then
contain the following entries:
. . .
A: continuous.
B: continuous.
Diff := A - B.
. . .
attributes excluded: A, B.
In this example the attributes A and B could not be defined as ignore because the definition of
Diff would then be invalid.
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