migraph (version 0.9.3)

create: Create networks with particular structures

Description

These functions create networks with particular structural properties. They can create either one-mode and two-mode networks, depending on whether the common n argument is passed a single integer (the number of nodes in the one-mode network) or a vector of two integers to return a two-mode network.

Usage

create_empty(n)
create_complete(n)
create_ring(n, width = 1, directed = FALSE, ...)
create_components(n, components = 2)
create_star(n, direction = c("undirected", "in", "out"))
create_tree(n, direction = c("undirected", "in", "out"), branches = 2)
create_lattice(n, direction = c("undirected", "in", "out"))

Arguments

n

Given:

• A single integer, e.g. n = 10, a one-mode network will be created.

• A vector of two integers, e.g. n = c(5,10), a two-mode network will be created.

• A migraph-compatible object, a network of the same dimensions will be created.

width

The width or breadth of the ring. This is typically double the degree.

directed

Whether the graph should be directed. By default FALSE.

...

Additional arguments passed on to igraph.

components

Number of components to divide the nodes into.

direction

One of the following options: "in", "out", or "undirected" (DEFAULT).

branches

How many branches at each level.

Value

By default an igraph object will be returned, but this can be coerced into other types of objects using as_matrix(), as_tidygraph(), or as_network().

Functions

• create_empty: Creates an empty graph of the given dimensions.

• create_complete: Creates a filled graph of the given dimensions, with every possible tie realised.

• create_ring: Creates a ring or chord graph of the given dimensions that loops around is of a certain width or thickness.

• create_components: Creates a graph in which the nodes are clustered into separate components.

• create_star: Creates a graph of the given dimensions that has a maximally central node

• create_tree: Creates a graph of the given dimensions with successive branches.

• create_lattice: Creates a graph of the given dimensions with ties to all neighbouring nodes

See Also

as_matrix as_tidygraph as_network

Other creation: generate

Examples

# NOT RUN {
autographr(create_empty(c(8,6))) +
autographr(create_complete(c(8,6)))
autographr(create_ring(8, width = 2)) + 
autographr(create_ring(c(8,6), width = 2))
autographr(create_components(c(10, 12), components = 3))
autographr(create_star(12, "in")) +
autographr(create_star(12, "out")) +
autographr(create_star(c(12,1), "in"))
autographr(create_tree(15, direction = "out")) + 
autographr(create_tree(15, direction = "out"), "tree") + 
autographr(create_tree(15, direction = "out", branches = 3), "tree")
autographr(create_lattice(5), layout = "kk") +
autographr(create_lattice(c(5,5))) +
autographr(create_lattice(c(5,5,5)))
# }