User's Manual

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Chapter 5
Some nodes have further displays givin g additional information about s tream execution. These
are displayed
by selecting the corresponding row in the dialog box. Th e first row is selected
automatically.
Working with Models
If a stream includes a mo deling node (that is, one f r om the Model ing or Database Modeling tab
of the nodes palette), a model nugget is created when the stre am is run. A model nugget is a
container for a model, tha t is, the set of rules, formulas or equations th at enables yo u to generate
predictions against your source data, and which lies at the heart of p r edictive an alytics.
Figure 5-32
Model nugget
When you successfully run a modeling node, a corresponding model nugget is placed on th e
stream canva s, where it is represented by a gold diamond-sha pe d icon (hence the name “nugget”).
You can open the nugg et and browse its contents to view details about the model. To view the
predictions, you attach and run one or more terminal nodes, the output from which prese nts
the predictions in a readable form.
Figure 5-33
Modeling and scoring branches in a stream
A typical modeling stream consists of two branches . The modeling branch contains the mode ling
node, toget her with the source and processing nodes that precede it. The scoring branch is
created when you run th e modeling node, and contains the model nugget and the terminal node or
nodes that you use to view the predictions.
For more informati on, see th e IBM® SPSS® Modeler Modeling Nodes guide.
Adding Comments and Annotations to Nodes and Streams
You may need to describe a stream to others in your organization. To help you d o this, you can
attach explanatory com ments to streams, nodes and model nuggets.