FF.graph.custom: Represent a firm-firm (FF) network using the package 'igraph'

In FinNet: Quickly Build and Manipulate Financial Networks

Represent a firm-firm (FF) network using the package igraph

Description

Create an object of class graph from the package igraph using a FF matrix of class financial_matrix

Usage

FF.graph.custom(
  x,
  vertex.size = NULL,
  vertex.colour = NULL,
  edge.width = NULL,
  edge.greyscale = NULL,
  directed = TRUE,
  loops = FALSE,
  weighted = any(x@M %in% c(0, 1)),
  ...
)

Arguments

x	A matrix-like object produced by FF and related functions
vertex.size	Which piece of information on the firms should be used to represent the nodes' size (see Details).
vertex.colour	Which piece of information on the firms should be used to represent the nodes' colours (see Details).
edge.width	Whether to use the edges' width to represent tie strength. Defaults to FALSE.
edge.greyscale	Whether to use the edges' colour to represent tie strength through a grey scale. Defaults to TRUE if the matrix is valued.
directed	Whether the network should be directed. Defaults to TRUE
loops	Whether the network should have loops. Defaults to FALSE
weighted	Whether the ties/edges should be weighted. Defaults to TRUE if any element of the matrix equals neither 0 nor 1
...	Aliases to the other parameters and additional settings (see Details).

Details

This function allows for a number of additional arguments.

Value

A network in the desired format

What can be passed to vertex.colour and vertex.size

The pieces of information that is possible to pass to vertex.size and vertex.colour are:

• capitalisation, will be arranged into steps (see capitalisation.bins below)

• revenue, will be arranged into steps (see revenues.bins below)

• legal_form

• sector

• currency

What can be passed to edge.width and edge.greyscale

The pieces of information that is possible to pass to edge.width and edge.greyscale are:

• capitalisation

• revenue

Additional parameters related to vertex.size

The effect of the additional parameters that modify the behaviour of vertex.size are:

vertex.size.max (defaults to 5) :

• if vertex.size or one of its aliases is specified, this is the size of the biggest vertex;

• if neither vertex.size nor any of its aliases is given, this is the size of ALL vertices.

vertex.size.min (defaults to 1):

• if vertex.size or one of its aliases is specified, this is the size of the smallest vertex;

• if neither vertex.size nor any of its aliases is given, it is ignored.

Additional parameters related to vertex.colour

The only additional parameter related to vertex.colour is vertex.colour.palette. It supports a vector of RGB or named colours (see colours for all named colours in R). It also accepts complete calls to functions that return a such a vector like RColorBrewer::brewer.pal(n, name) or viridisLite::viridis(n, option). If the palette is too short, it will be extended automatically using colorRampPalette. If the palette is not declared, but this arguemnt is TRUE, it will defaulr to the following vector of colours:

• #00204D, Oxford Blue

• #31446B, Police Blue

• #666970, Dim Grey

• #958F78, Artichoke

• #CBBA69, Dark Khaki

• #FFEA46, Gargoyle Gas

If the argument is FALSE, NULL or NA, the vertex will be coloured of #081677 (Gentian blue).

Additional parameters related to edge.width

edge.width.max (defaults to 5) :

• if edge.width or one of its aliases is specified, this is the thickness of the thickest edge;

• if neither edge.width nor any of its aliases is given, this is the thickness of ALL edges

edge.width.min (defaults to 1):

• if edge.width or one of its aliases is specified, this is the thickness of the slimmest edge;

• if neither edge.width nor any of its aliases is given, it is ignored.

Additional parameters related to edge.greyscale

edge.greyscale.darkest (defaults to 5) :

• if edge.greyscale or one of its aliases is specified, this is the thickness of the thickest edge;

• if neither edge.greyscale nor any of its aliases is given, this is the thickness of ALL edges

edge.greyscale.fairest (defaults to 1):

• if edge.greyscale or one of its aliases is specified, this is the thickness of the slimmest edge;

• if neither edge.greyscale nor any of its aliases is given, it is ignored.

Several aliases are accepted for all arguments, except M:

• for vertex.size: node.size

• for vertex.colour: vertex.color, node.colour, and node.color;

• for edge.width: tie.width

• for edge.greyscale: tie.grayscale, tie.greyscale, and edge.grayscale

Author(s)

Telarico, Fabio Ashtar

See Also

FF.net FF.net.custom FF.graph

Examples

# Create the graph representation of the binary FF of
# Berkshire Hataway's holdings based on common ownership
data("firms_BKB")
x <- FF.naive.ownership(firms_BKB)
FF.graph.custom(x = x, node.size = 3)

FinNet documentation built on Oct. 31, 2024, 5:07 p.m.