manip_scope: Modifying networks scope

In manynet: Many Ways to Make, Modify, Map, Mark, and Measure Myriad Networks

Modifying networks scope

Description

These functions offer tools for transforming manynet-consistent objects (matrices, igraph, tidygraph, or network objects). Transforming means that the returned object may have different dimensions than the original object.

• to_ego() scopes a network into the local neighbourhood of a given node.

• to_giant() scopes a network into one including only the main component and no smaller components or isolates.

• to_no_isolates() scopes a network into one excluding all nodes without ties.

• to_no_missing() scopes a network to one retaining only complete cases, i.e. nodes with no missing values.

• to_subgraph() scopes a network into a subgraph by filtering on some node-related logical statement.

• to_blocks() reduces a network to ties between a given partition membership vector.

Usage

to_no_missing(.data)

to_ego(.data, node, max_dist = 1, min_dist = 0, direction = c("out", "in"))

to_time(.data, time)

to_giant(.data)

to_no_isolates(.data)

to_subgraph(.data, ...)

to_blocks(.data, membership, FUN = mean)

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
node	Name or index of node.
max_dist	The maximum breadth of the neighbourhood. By default 1.
min_dist	The minimum breadth of the neighbourhood. By default 0. Increasing this to 1 excludes the ego, and 2 excludes ego's direct alters.
direction	String, either "out" or "in".
time	A time point or wave at which to present the network.
...	Arguments passed on to dplyr::filter
membership	A vector of partition memberships.
FUN	A function for summarising block content. By default mean. Other recommended options include median, sum, min or max.

Details

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

	data.frame	igraph	list	matrix	network	tbl_graph
to_blocks	1	1	0	1	1	1
to_ego	0	1	0	0	0	1
to_giant	1	1	0	1	1	1
to_no_isolates	1	1	1	1	1	1
to_subgraph	1	1	0	1	1	1

Value

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.

to_blocks()

Reduced graphs provide summary representations of network structures by collapsing groups of connected nodes into single nodes while preserving the topology of the original structures.

See Also

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

Examples

ison_adolescents %>%
  mutate_ties(wave = sample(1995:1998, 10, replace = TRUE)) %>%
  to_waves(attribute = "wave") %>%
  to_no_isolates()

manynet documentation built on June 23, 2025, 9:07 a.m.