Convert a Ladybug Query Result to an igraph Object

Converts a Ladybug query result into an igraph graph object.

Usage

as_igraph(query_result)

Arguments

query_result

A ladybug_query_result object from lb_execute() that contains a graph.

Value

An igraph object.

Details

This function takes a ladybug_query_result object and extracts nodes and edges directly from the query results, then constructs an igraph object. It is the final step in the lb_execute -> as_igraph workflow.

Examples

# \donttest{
if (requireNamespace("igraph", quietly = TRUE)) {
  conn <- lb_connection(":memory:")
  lb_execute(conn, "CREATE NODE TABLE Person(name STRING,
  PRIMARY KEY (name))")
  lb_execute(conn, "CREATE REL TABLE Knows(FROM Person TO Person)")
  lb_execute(conn, "CREATE (p:Person {name: 'Alice'}),
  (q:Person {name: 'Bob'})")
  lb_execute(conn, "MATCH (a:Person), (b:Person) WHERE
                                                    a.name='Alice' AND
                                                    b.name='Bob'
                                                    CREATE (a)-[:Knows]->(b)"
)

  res <- lb_execute(conn, "MATCH (p:Person)-[k:Knows]->(q:Person)
  RETURN p, k, q")
  g <- as_igraph(res)
  print(g)
  rm(conn, res, g)
}
#> Error in py_run_string_impl(code, local, convert): AttributeError: 'NoneType' object has no attribute 'Database'
#> Run `reticulate::py_last_error()` for details.
# }