Filter
Top Products
92
Chapter 5
Map to.
This method starts with the node to be in troduced to the stream. First, right-click the node
to introduce;
then, using the Data Mapping > Map To option from the p op-up menu, select the node
to which it should join. This method is particularly useful for mapping to a termina l node. Note:
You cannot map to Merge or Append nodes. Instead, you shoul d simply connect the stream to the
Merge node in
the normal manner.
Figure 5-44
Selecting data mapping options
Data mapping is tightly integrated into stream building. If you try to connect to a node that
already has a con nection, you will be offered the option of replacing the connection or mapping to
that node.
Mapping Data to a Template
To replace the data source for a template stream with a new source node bringing y our own data
into IBM® SPSS® Modeler, you should use the Select Replacement Node option from the Data
Mapping pop-up menu. This option is available for all nodes except Merge, A ggregate, and all
terminal nodes. Using the data mapping tool to perform this action helps ensure that fields are
matched properly between the existing stream operations and the new data source. The following
steps provide an overview of the data mapping process.
Step 1: Specify essential fields in the original source node.
In order for stream operations to run
properly, essential fields should be specified. For more information, see the topic Specifying
Essenti al Fields on p. 94.
Step 2: Add new data source to the stream canvas.
Using one of the source nodes, bring in the
new replacement data.