Databases Reference
In-Depth Information
the mining model viewer view as soon as the server processes the
clustering mining model. In the mining model viewer view, the default
viewer shows the decision tree mining model. Click the mining model
drop-down list and select Clustering, the name of the clustering min-
ing model you have created (
Figure 14-21
).
You will now see the clustering mining model represented as several nodes
with lines between these nodes as shown in
Figure 14-21
. By default the
clustering mining model groups the customer into ten different clusters. The
number of clusters to be generated can be changed from a property for the
cluster mining model. Each cluster is shown as a node in the cluster viewer.
The shade of the node is dependent upon the shading variable column and a
specific state of the column that is shown in the viewer. Darker shading on the
node indicates that the cluster favors a specific input column and vice versa.
If there is a relationship (that is, similarity) between two clusters, that is indic-
ated by a line connecting the two nodes. Similar to the shade of the color
node, if the relationship is stronger between two nodes, it is indicated via a
stronger line such as the relationship between clusters cluster5 and cluster6.
You can move the slider on the left of the cluster diagram from All Links to
Strongest Links. As you move the slider from All Links to Strongest Links you
can see the weaker relationships between the clusters are not displayed. You
can change the cluster name by right-clicking the cluster and selecting Re-
name. The cluster diagram helps you get an overall picture of the clusters,
how the cluster is affected based on a specific column of the model that is
used as the shading variable, as well as the relationship between clusters.
In
Figure 14-21
the chosen column is population. Population is the name that
is used in the mining model viewer for the entire data set used for training the
mining model. You can select desired input columns of the mining model from
drop-down for Shading Variable to see the effect of the column on the various
clusters. When you choose a specific shading variable column you need to
choose one of the states of the column to be used as the shading variable for
the clusters.
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