Indices of (Directed) Edges

Parse a text representation of (directed) edges, return the index of the directed edge within the edge list.

parse.edge(lines, edges)

Arguments

lines	a vector of strings representing directed edges
edges	an edge list

Value

the indices of the directed edges within the edge list

Details

Each directed edge is represented as a string consisting of two node labels separated by an arrow, where the arrow consists of a sequence of dashes "-" followed by one of the character sequences ">","*","<>". The number of dashes used in the arrow is ignored.

Examples

## Sample model
edges <- parse.digraph(c(
  "E *-> D",
  "D *-> C",
  "C -> E",
  "E *-> B",
  "B *-> A",
  "A -> E",
  "D --> B"))
edges <- enforce.limitation(edges)
parse.edge(c("E->D","D-*E","A-*B"),edges)
#> [1]  1  8 11