manip_preformat function

Modifying network formats

These functions add some format to manynet-consistent data.

• to_directed() reformats undirected network data to a directed network.
• to_redirected() reformats the direction of directed network data, flipping any existing direction.
• to_reciprocated() reformats directed network data such that every directed tie is reciprocated.
• to_acyclic() reformats network data to an acyclic graph.
• to_named() reformats unlabelled network data to labelled network data from a vector of names or random baby names.
• to_signed() reformats unsigned network data to signed network data with signs from a mark vector or at random.

If the format condition is not met, for example to_undirected() is used on a network that is already undirected, the network data is returned unaltered. No warning is given so that these functions can be used to ensure conformance.

Unlike the as_*() group of functions, these functions always return the same class as they are given, only transforming these objects' properties.

to_named(.data, names = NULL)

to_signed(.data, mark = NULL)

to_weighted(.data, measure = NULL)

Arguments

• .data: An object of a manynet-consistent class:

  • matrix (adjacency or incidence) from {base} R
  • edgelist, a data frame from {base} R or tibble from {tibble}
  • igraph, from the {igraph} package
  • network, from the {network} package
  • tbl_graph, from the {tidygraph} package

• names: Character vector of the node names. NULL by default.

• mark: A mark (logical vector) the length of the ties in the network.

• measure: A numeric vector (measure) that will be added as the tie weights to the network. If this is NULL, then the tie weights will be drawn from a Poisson distribution with $\lambda = 4$.

Returns

All to_ functions return an object of the same class as that provided. So passing it an igraph object will return an igraph object and passing it a network object will return a network object, with certain modifications as outlined for each function.

Details

Not all functions have methods available for all object classes. Below are the currently implemented S3 methods:

	data.frame	igraph	matrix	network	tbl_graph
to_acyclic	1	1	1	1	1
to_directed	1	1	1	1	1
to_named	1	1	1	1	1
to_reciprocated	1	1	1	1	1
to_redirected	1	1	1	1	1
to_simplex	0	1	1	0	1

See Also

Other modifications: manip_as, manip_correlation, manip_deformat, manip_from, manip_levels, manip_miss, manip_nodes, manip_paths, manip_permutation, manip_project, manip_reformat, manip_scope, manip_split, manip_ties