Enum PNAAggregator

Namespace

AiDotNet.Enums

Assembly

AiDotNet.dll

Aggregation function types for Principal Neighbourhood Aggregation (PNA).

public enum PNAAggregator

Fields

Max = 1

Max aggregation - takes maximum of neighbor features.

Mean = 0

Mean aggregation - averages neighbor features.

Min = 2

Min aggregation - takes minimum of neighbor features.

StdDev = 4

Standard deviation aggregation - computes std of neighbor features.

Sum = 3

Sum aggregation - sums neighbor features.

Remarks

For Beginners: These are different ways to combine information from neighbor nodes:

• Mean: Average all neighbor features (balanced, smooth)
• Max: Take the maximum value (emphasizes strong signals)
• Min: Take the minimum value (emphasizes weak signals)
• Sum: Add up all features (sensitive to number of neighbors)
• StdDev: Standard deviation (captures variance in neighborhood)