igraph v0.7.0


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by Gabor Csardi

Network analysis and visualization

Routines for simple graphs and network analysis. igraph can handle large graphs very well and provides functions for generating random and regular graphs, graph visualization, centrality indices and much more.

Functions in igraph

Name Description
alpha.centrality Find Bonacich alpha centrality scores of network positions
as.directed Convert between directed and undirected graphs
compare.communities Compares community structures using various metrics
graph-motifs Graph motifs
stCuts List all (s,t)-cuts of a graph
graph.bipartite Create a bipartite graph
igraphtest Run package tests
is.dag Directed acyclic graphs
graph.automorphisms Number of automorphisms
communities Functions to deal with the result of network community detection
k.regular.game Create a random regular graph
Hierarchical random graphs Hierarchical random graphs
get.edge.ids Find the edge ids based on the incident vertices of the edges
igraph-package The igraph package
multilevel.community Finding community structure by multi-level optimization of modularity
graph.data.frame Creating igraph graphs from data frames or vice-versa
minimal.st.separators Minimum size vertex separators
graph.difference Difference of graphs
nexus Query and download from the Nexus network repository
cocitation Cocitation coupling
cohesive.blocks Calculate Cohesive Blocks
line.graph Line graph of a graph
sbm.game Sample stochastic block model
simplify Simple graphs
scgExtra SCG Extra Functions
graph.graphdb Load a graph from the graph database for testing graph isomorphism.
triad.census Triad census, subgraphs with three vertices
graph.famous Creating named graphs
graph.lcf Creating a graph from LCF notation
graph.coreness K-core decomposition of graphs
attributes Graph, vertex and edge attributes
infomap.community Infomap community finding
Pie charts as vertices Using pie charts as vertices in graph plots
conversion Convert a graph to an adjacency matrix or an edge list
unfold.tree Convert a general graph into a forest
is.separator Vertex separators
igraph options Parameters for the igraph package
Vertex shapes Various vertex shapes when plotting igraph graphs
is.mutual Find mutual edges in a directed graph
layout.sugiyama The Sugiyama graph layout generator
get.adjlist Adjacency lists
fastgreedy.community Community structure via greedy optimization of modularity
similarity Similarity measures of two vertices
static.power.law.game Scale-free random graphs, from vertex fitness scores
graph.eigen Eigenvalues and eigenvectors of the adjacency matrix of a graph
layout.mds Graph layout by multidimensional scaling
graph.maxflow Maximum flow in a network
igraph.version Query igraph's version string
read.graph Reading foreign file formats
rewire Graph rewiring
static.fitness.game Random graphs from vertex fitness scores
closeness Closeness centrality of vertices
rewire.edges Rewires the endpoints of the edges of a graph randomly
watts.strogatz.game The Watts-Strogatz small-world model
graph.diversity Graph diversity
layout.drl The DrL graph layout generator
topological.sort Topological sorting of vertices in a graph
graph.incidence Create graphs from an incidence matrix
graph.union Union of graphs
Combining attributes How igraph functions handle attributes when the graph changes
as.igraph Conversion to igraph
bipartite.projection Project a bipartite graph
is.weighted Weighted graphs
graph.knn Average nearest neighbor degree
community.to.membership Common functions supporting community detection algorithms
igraph console The igraph console
kleinberg Kleinberg's centrality scores.
graph.disjoint.union Disjoint union of graphs
grg.game Geometric random graphs
graph.dfs Depth-first search
is.igraph Is this object a graph?
is.multiple Find the multiple or loop edges in a graph
walktrap.community Community strucure via short random walks
label.propagation.community Finding communities based on propagating labels
preference.game Trait-based random generation
leading.eigenvector.community Community structure detecting based on the leading eigenvector of the community matrix
maximum.cardinality.search Maximum cardinality search
shortest.paths Shortest (directed or undirected) paths between vertices
minimum.size.separators Minimum size vertex separators
subgraph Subgraph of a graph
traits Graph generation based on different vertex types
contract.vertices Contract several vertices into a single one
convex.hull Convex hull of a set of vertices
dendPlot Plot dendrograms
get.incidence Incidence matrix of a bipartite graph
constraint Burt's constraint
graph.density Graph density
dendPlot.communities Community structure dendrogram plots
Graphs from adjacency lists Create graphs from adjacency lists
is.chordal Chordality of a graph
conversion between igraph and graphNEL graphs Convert igraph graphs to graphNEL objects or back
aging.prefatt.game Generate an evolving random graph with preferential attachment and aging
plot.igraph Plotting of graphs
running.mean Running mean of a time series
assortativity Assortativity coefficient
canonical.permutation Canonical permutation of a graph
modularity Modularity of a community structure of a graph
adjacent.triangles Count adjacenct triangles
power.law.fit Fitting a power-law distribution function to discrete data
stMincuts List all minimum $(s,t)$-cuts of a graph
betweenness Vertex and edge betweenness centrality
biconnected.components Biconnected components
graph.formula Creating (small) graphs via a simple interface
graph.complementer Complementer of a graph
arpack ARPACK eigenvector calculation
erdos.renyi.game Generate random graphs according to the Erdos-Renyi model
degree.sequence.game Generate random graphs with a given degree sequence
girth Girth of a graph
growing.random.game Growing random graph generation
independent.vertex.sets Independent vertex sets
iterators Vertex and edge sequences and iterators
layout Generate coordinates for plotting graphs
interconnected.islands A graph with subgraphs that are each a random graph.
tkplot Interactive plotting of graphs
get.stochastic Stochastic matrix of a graph
structure.info Gaining information about graph structure
diameter Diameter of a graph
eccentricity Eccentricity and radius
evcent Find Eigenvector Centrality Scores of Network Positions
tkigraph Experimental basic igraph GUI
bipartite.mapping Decide whether a graph is bipartite
is.named Named graphs
igraphdemo Run igraph demos, step by step
subgraph.centrality Find subgraph centrality scores of network positions
graph.intersection Intersection of graphs
layout.star Generate coordinates to place the vertices of a graph in a star-shape
neighborhood Neighborhood of graph vertices
transitivity Transitivity of a graph
graph.matching Graph matching
plot.sir Plotting the results on multiple SIR model runs
scgGrouping SCG Problem Solver
write.graph Writing the graph to a file in some format
bipartite.random.game Bipartite random graphs
autocurve.edges Optimal edge curvature when plotting graphs
forest.fire.game Forest Fire Network Model
Graphlets Graphlet decomposition of a graph
graph.constructors Various methods for creating graphs
layout.bipartite Simple two-row layout for bipartite graphs
permute.vertices Permute the vertices of a graph
graph.structure Method for structural manipulation of graphs
graph.compose Compose two graphs as binary relations
layout.grid Simple grid layout
sir SIR model on graphs
srand Set random seed of the C library's RNG
decompose.graph Decompose a graph into components
print.igraph Print graphs to the terminal
dominator.tree Dominator tree
igraph.undocumented Undocumented and unsupportted igraph functions
vertex.connectivity Vertex connectivity.
clusters Connected components of a graph
graph.laplacian Graph Laplacian
scgSemiProjectors Semi-Projectors
dyad.census Dyad census of a graph
edge.betweenness.community Community structure detection based on edge betweenness
Spectral coarse graining Spectral Coarse Graining
cliques The functions find cliques, ie. complete subgraphs in a graph
centralization Centralization of a graph.tmax
components In- or out- component of a vertex
dendPlot.igraphHRG HRG dendrogram plot
barabasi.game Generate scale-free graphs according to the Barabasi-Albert model
rglplot 3D plotting of graphs with OpenGL
graph.de.bruijn De Bruijn graphs.
layout.merge Merging graph layouts
page.rank The Page Rank algorithm
articulation.points Articulation points of a graph
Drawing graphs Drawing graphs
igraph.sample Sampling a random integer sequence
bonpow Find Bonacich Power Centrality Scores of Network Positions
spinglass.community Finding communities in graphs based on statistical meachanics
degree Degree and degree distribution of the vertices
graph.adjacency Create graphs from adjacency matrices
edge.connectivity Edge connectivity.
revolver Measuring the driving force in evolving networks
graph.bfs Breadth-first search
graph.strength Strength or weighted vertex degree
is.degree.sequence Degree sequences of graphs
minimum.spanning.tree Minimum spanning tree
scg All-in-one Function for the SCG of Matrices and Graphs
graph.full.bipartite Create a full bipartite graph
graph-isomorphism Graph Isomorphism
graph.kautz Kautz graphs
optimal.community Optimal community structure
reciprocity Reciprocity of graphs
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Date 2014-02-04
License GPL (>= 2)
URL http://igraph.org
SystemRequirements gmp, libxml2
BugReports https://github.com/igraph/igraph/issues
Packaged 2014-02-04 21:57:23 UTC; gaborcsardi
NeedsCompilation yes
Repository CRAN
Date/Publication 2014-02-05 08:45:17

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