Arguments

dist=n: Edge distance from the targets. n =0 can be specified. If so, adds only edges between the specified nodes. (default: n =1)
node=v₁ [ :v₂: ... ]: Name list of target nodes. The subnetwork is made of edges and nodes connected from these target nodes within the specified distance.
file=str: The target nodes are read from the file. The file needs to be a tab-delimited text file, and a column of each line is recognized as a target node. The column position is set by col.
col=n: Column position of the file to read as target nodes. 1 represents the first (left-most) column.
dir= ( both | up | down ): up: Only upstream nodes and edges are included.
down: Only downstream nodes and edges are included.
both: Both of up- and downstreams. (default)