networkPlot: Plotting Bibliographic networks

Description

networkPlot plots a bibliographic network.

Usage

networkPlot(
  NetMatrix,
  normalize = NULL,
  n = NULL,
  degree = NULL,
  Title = "Plot",
  type = "auto",
  label = TRUE,
  labelsize = 1,
  label.cex = FALSE,
  label.color = FALSE,
  label.n = NULL,
  halo = FALSE,
  cluster = "walktrap",
  community.repulsion = 0.1,
  vos.path = NULL,
  size = 3,
  size.cex = FALSE,
  curved = FALSE,
  noloops = TRUE,
  remove.multiple = TRUE,
  remove.isolates = FALSE,
  weighted = NULL,
  edgesize = 1,
  edges.min = 0,
  alpha = 0.5,
  verbose = TRUE
)

Value

It is a list containing the following elements:

`graph`		a network object of the class `igraph`
`cluster_obj`		a `communities` object of the package `igraph`
`cluster_res`		a data frame with main results of clustering procedure.

Arguments

NetMatrix

is a network matrix obtained by the function biblioNetwork.

normalize

is a character. It can be "association", "jaccard", "inclusion","salton" or "equivalence" to obtain Association Strength, Jaccard, Inclusion, Salton or Equivalence similarity index respectively. The default is type = NULL.

n

is an integer. It indicates the number of vertices to plot.

degree

is an integer. It indicates the min frequency of a vertex. If degree is not NULL, n is ignored.

Title

is a character indicating the plot title.

type

is a character object. It indicates the network map layout:

`type="auto"`		Automatic layout selection
`type="circle"`		Circle layout
`type="sphere"`		Sphere layout
`type="mds"`		Multidimensional Scaling layout
`type="fruchterman"`		Fruchterman-Reingold layout
`type="kamada"`		Kamada-Kawai layout

label

is logical. If TRUE vertex labels are plotted.

labelsize

is an integer. It indicates the label size in the plot. Default is labelsize=1

label.cex

is logical. If TRUE the label size of each vertex is proportional to its degree.

label.color

is logical. If TRUE, for each vertex, the label color is the same as its cluster.

label.n

is an integer. It indicates the number of vertex labels to draw.

halo

is logical. If TRUE communities are plotted using different colors. Default is halo=FALSE

cluster

is a character. It indicates the type of cluster to perform among ("none", "optimal", "louvain","leiden", "infomap","edge_betweenness","walktrap", "spinglass", "leading_eigen", "fast_greedy").

community.repulsion

is a real. It indicates the repulsion force among network communities. It is a real number between 0 and 1. Default is community.repulsion = 0.1.

vos.path

is a character indicating the full path where VOSviewer.jar is located.

size

is integer. It defines the size of each vertex. Default is size=3.

size.cex

is logical. If TRUE the size of each vertex is proportional to its degree.

curved

is a logical or a number. If TRUE edges are plotted with an optimal curvature. Default is curved=FALSE. Curved values are any numbers from 0 to 1.

noloops

is logical. If TRUE loops in the network are deleted.

remove.multiple

is logical. If TRUE multiple links are plotted using just one edge.

remove.isolates

is logical. If TRUE isolates vertices are not plotted.

weighted

This argument specifies whether to create a weighted graph from an adjacency matrix. If it is NULL then an unweighted graph is created and the elements of the adjacency matrix gives the number of edges between the vertices. If it is a character constant then for every non-zero matrix entry an edge is created and the value of the entry is added as an edge attribute named by the weighted argument. If it is TRUE then a weighted graph is created and the name of the edge attribute will be weight.

edgesize

is an integer. It indicates the network edge size.

edges.min

is an integer. It indicates the min frequency of edges between two vertices. If edge.min=0, all edges are plotted.

alpha

is a number. Legal alpha values are any numbers from 0 (transparent) to 1 (opaque). The default alpha value usually is 0.5.

verbose

is a logical. If TRUE, network will be plotted. Default is verbose = TRUE.

Details

The function networkPlot can plot a bibliographic network previously created by biblioNetwork.

Examples

Run this code

# EXAMPLE Keywordd co-occurrence network

data(management, package = "bibliometrixData")

NetMatrix <- biblioNetwork(management, analysis = "co-occurrences", 
network = "keywords", sep = ";")

net <- networkPlot(NetMatrix, n = 30, type = "auto", Title = "Co-occurrence Network",labelsize=1)