BUILT-IN MATHEMATICA SYMBOL

PropertyValue

gives the property value associated with name for item in obj.

MORE INFORMATION

Properties are used to store and manipulate pairs for specific named items within an object such as Graph.

PropertyValue returns $Failed whenever there is no property value available for name.

PropertyValue[{obj, item}, name]=val can be used to modify the property value.

The items available for Graph objects include vertices and edges.

EXAMPLES

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Basic Examples (1)

Generate a complete graph with properties:

Retrieve the property value associated with property name:

Change the property value:

Unset the property value:

Generate a complete graph with properties:

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Retrieve the property value associated with property name:

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Change the property value:

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Unset the property value:

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Scope (8)

Set a property value for vertex 1:

Retrieve the property value for vertex 1:

Set a property value for the edge

:

Retrieve the property value for the edge

:

Unset properties for vertices:

And edges:

PropertyValue returns $Failed for undefined properties:

Standard vertex properties include VertexStyle:

Non-visual properties include VertexWeight:

Set a custom property:

Standard edge properties include EdgeStyle:

EdgeLabels:

Non-visual properties include EdgeWeight:

Set a custom property:

Applications (5)

Use Do to set several property values:

Or different property values for different items:

Use Table to build a list of property values:

Create a weighted graph:

Set edge weights:

Compute weight scale:

Set the edge thickness to reflect the edge weight:

Highlight a path and mark the beginning point and endpoint:

Select vertices along a path:

Highlight by setting edge style along the path and vertex labels for start point and endpoint:

Dynamically highlight the edges in the order given by EdgeList:

Do five updates a second:

Dynamically visualize breadth-first search:

Properties & Relations (4)

Use Property as a wrapper to specify properties in functions such as Graph:

Use PropertyList to test for the presence of a property:

Generate a list of vertex label rules:

Use SetProperty to set a property without changing the original:

The original graph is unchanged:

Use RemoveProperty to remove a property without changing the original:

The original graph is unchanged:

Possible Issues (2)

PropertyValue returns $Failed for undefined properties:

Use PropertyList to test for the presence of a property:

PropertyValue may return $Failed even when a property value exists:

Use PropertyList to check for actual property values: