Databases Reference
In-Depth Information
Figure 14-12
The legend in
Figure 14-13
shows that blue (Value=0) indicates customers
who are not bike buyers, red (Value=1) indicates the customers who have
bought bikes, and white indicates customers for whom the BikeBuyer value is
missing. Even though the underlying relational data source does not have a
missing value for the BikeBuyer column, the algorithm does add a small per-
centage (0.03%) for the root node so that algorithm is not biased for certain
prediction inputs. The split from a node at one level to nodes in the next level
is based on a condition that is determined by an input column that influences
the predictable attribute which is shown within the node such as Re-
gion=North America.
Search WWH ::
Custom Search