57
Building Streams
Maximumnumber o fr ows to show in Data Preview. Specify the number of rows to be shown when
a preview of the data is requested for a node. For more information, see the topic Previewing
Data in Nodes on p. 52.
Maximum members for nominal fields. Select to sp ecify a maximum number of members for
nominal (set) fields after which the data type of the field becomes Typeless. This o ption is useful
when working with large nominal fields. Note: When the measu rement level of a field is set to
Typeless,its r ole is automatically set to None. This me ans that the fields are not available for
modeling.
Limitset size for Kohonen, and K-Means modeling. Select to specify a maximum number of members
for nominal fields used in Kohonen nets and K-Means modeling. The default set size is 20, after
which the field is ignored and a warning is raised, providing information on the field in question.
Note that, for compatibility, this option also applies to the old Neural Network node that was
replaced in version 14 of IBM® SPSS® Modeler; some legacy streams may still contain this node.
Refreshsource no des on execution. Select to automati cally refresh all source nodes when running
the current stream. This action is analo gous to clicking the
Refresh button on a source node,
except that this option automatically refreshes all source nodes (except User Input nodes) for the
current stream.
Note: Selecting this option flushes the caches of downstream nodes even if the data has not
changed. Flushing occurs only once per running of the stream, though, which means that you can
still use downstream caches as temporary storage for a single running. For example, say that you
have set a cache midstream after a complex derive operation and that you have sev eral graphs
and reports attached downstream of this Derive node. When running the stream, the cache at the
Derive node will be flushed and refilled but only for the first graph or report. Sub sequent terminal
nodes will read data from the Derive node cache.
Displayfield and value lab elsin output. Displays field and value labels in tables, charts, a nd other
output. If labels do not exist, the field names and data values will be displaye d instead. Labels are
turned off by default; however, you can toggle labels on an individual basis elsewhere in SPSS
Modeler. You can also choose to display labels on the output window using a toggle button
available on the toolbar.
Figure 5-16
Toolbaricon used to toggle field and value labels
Displayexecu tiontim es. Displays individual ex ecution times for stream nodes on the Execution
Times tab after the stream is run. For m ore information, see the topic Viewing Node Execution
Times on p. 67.
SaveAs Defa ult. The options specified appl y only to the current stream. Click this button to set
these options as the default for all streams.
Setting date and time options for streams
These options specify the format to use for various date and time expressions in the current stream.