ExtensionMethodsGraphReduceTValue, TTime Method Naiad Help

[This is preliminary documentation and is subject to change.]

For each target node in edges, aggregates the values at the neighboring nodes using the given combiner.

Namespace: Microsoft.Research.Naiad.Frameworks.GraphLINQ
Assembly: Microsoft.Research.Naiad.GraphLINQ (in Microsoft.Research.Naiad.GraphLINQ.dll) Version: 0.5.0.0 (0.5.0.0)
Syntax
C#
Copy
public static Stream<NodeWithValue<TValue>, TTime> GraphReduce<TValue, TTime>(
	this Stream<NodeWithValue<TValue>, TTime> nodes,
	Stream<Edge, TTime> edges,
	Func<TValue, TValue, TValue> combiner,
	bool useLocalAggregation
)
where TTime : Object, Time<TTime>

Parameters

nodes
Type: Microsoft.Research.NaiadStreamNodeWithValueTValue, TTime
The stream of nodes with values.
edges
Type: Microsoft.Research.NaiadStreamEdge, TTime
The stream of edges.
combiner
Type: SystemFuncTValue, TValue, TValue
A function from current value and incoming value, to the new value.
useLocalAggregation
Type: SystemBoolean
If true, pre-aggregates locally at each worker before the global aggregation.

Type Parameters

TValue
The type of value associated with each node.
TTime
The type of timestamp on each record.

Return Value

Type: StreamNodeWithValueTValue, TTime
The stream of aggregated values for each target of an edge in edges.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type StreamNodeWithValueTValue, TTime. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Remarks
This operator produces a single value for each target node. The TransmitAlongTValue, TTime(StreamNodeWithValueTValue, TTime, StreamEdge, TTime) operator produces one value per source node.
See Also

Reference

ExtensionMethods Class
Microsoft.Research.Naiad.Frameworks.GraphLINQ Namespace