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SAS/GRAPH(R) 9.2: Network Visualization Workshop Help

Understanding Selection Mode

By default, when you select an observation in a graph or data table, that observation is automatically selected in all graphs and data tables associated with the project. You can change the default behavior so that a selection is limited to the graph or data table in which the selection is made.
SAS/GRAPH Network Visualization Workshop supports two selection modes:
Global selection mode
The default mode. All data views (graphs and data tables) share a common observation selection state.
Global selection mode enables you to graphically subset data at a single level. Suppose you have three graphs: A, B, and C. Selecting a subset of the observations in graph A causes graphs B and C to treat that same subset as selected.
Local selection mode
Each data view has a private observation selection state. When you select an observation in a graph or data table, the observation is marked as selected only for that view.
Local selection mode enables you to graphically subset data at multiple levels. Suppose you have three graphs: A, B, and C. You can select some observations in graph A. Then you can select different observations in graph B. Finally, you can configure graph C to display either the union or the intersection of the selections made in graphs A and B.
While in local selection mode, a graph operates in one of two roles:
  • Selector role: A view that has a selector role enables you to manually select observations. When you select an observation, the observation is marked as selected only for that view.
  • Observer role: A view that has an observer role does not allow you to select observations. An observer view treats an observation as selected based on the observation's selection state in the selector views and on the observer view's scheme. There are two observer view schemes:
    • The union scheme treats an observation as selected if the observation is selected in any of the selector views.
    • The intersection scheme treats an observation as selected if the observation is selected in all of the selector views.

See Also

Configure Local Selection Mode