KNN

Processor that builds graph edges by connecting each node to its k nearest neighbors in a coordinate space. It produces the edge index and the corresponding edge weights (neighbor distances).

Configuration

Selected as name: knn.

Option	Description	Type	Default
by	Columns identifying the per-event grouping the graph is built within.	column(s)	required
col	Column holding the per-node coordinates used for neighbor search.	str | int	required
out	Two columns to write: the edge index and the edge weights.	column(s)	required
k	Number of nearest neighbors connected per node.	int	required

- name: knn
  kwargs:
    by: event_id
    col: position
    out: [ edge_index, edge_attr ]
    k: 8