Command reference

All nwcommands commands, grouped as in help nwtopical.

nwsaom, nwergm, nwdynam and nwrem are not part of the core. They are separate GPL-3 packages with their own sections (see the menu); the entries below only point to them. The complete syntax is in each package’s own Stata help (help nwsaom etc.).

Concepts

netexample — Example network data sets
netexp — Network expression and function
netlist — List of existing networks
netname — Name of an existing network
newnetname — Name of a new network
nodeid — Identification of nodes

Import/Export

nw2fromedge — Import two-mode network data from an edge list
nw2set — Declare data to be two-mode network data
nw2toedge — Convert a two-mode network to an edge list
nwappend — Append a network dataset
nwexport — Export a network as a Pajek, UCINET, GML or edge list file
nwfromedge — Import network data from an edge list
nwimport — Import a network from a Pajek, UCINET, GML or edge list file
nwsave — Save network data in a file
nwset — Declare data to be network data
nwtoedge — Convert a network to an edge list
nwuse — Load a Stata network dataset
nwwebuse — Load network data over the web

Generators

nwduplicate — Duplicate a network
nwdyadprob — Generate a network based on tie probabilities
nwexpand — Expand a variable to a network
nwgen — Generate variables or networks with network functions (like egen)
nwgenerate — Generate a network from a function or a network expression
nwgenvar — Generate variables or networks with network functions (like egen)
nwhomophily — Generate a homophily network
nwlattice — Generate a lattice network
nwpermute — Generate a permutation of a network
nwpref — Generate a preferential-attachment network
nwrandom — Generate a random network
nwring — Generate a ring-lattice network
nwsmall — Generate a small-world network

Information

nwds — List the networks in memory (like ds)
nwdyads — Dyad census
nwissymmetric — Check whether a network is symmetric
nwmotifs — 4-node undirected motif/graphlet census
nwname — Obtain and change meta-information of a network
nwsummarize — Summarize a network
nwtabulate — One-way table of dyads
nwtriads — Triad census of a network

Manipulation

nw2project — One-mode projection of a two-mode network
nwaddnodes — Add nodes to network
nwattime — Static graph view of a temporal network at a given time
nwcollapse — Collapse a network
nwdichotomize — Dichotomize a network at a threshold
nwdrop — Drop networks or nodes
nwdropnodes — Drop nodes from a network
nwkeep — Keep networks or nodes
nwkeepnodes — Keep nodes of a network
nwnoderename — Rename a single node in a network
nwpreserve — Preserve and restore network data
nwproject — One-mode projection of a two-mode network (alias for nw2project)
nwrecode — Recode a network
nwrename — Rename a network
nwreplace — Replace a network
nwreplacemat — Replace network with Stata or Mata matrix
nwrestore — Restore network data previously preserved
nwstack — Stack several networks into one block-diagonal network
nwsubset — Subset the nodes of a network
nwsym — Symmetrize a network
nwsymmetrize — Symmetrize a network (alias for nwsym)
nwtranspose — Transpose a network

Analysis

Centrality

nw2degree — Two-mode (bipartite) degree centrality
nwbetween — Betweenness centrality
nwcentrality — Node centrality measures
nwcloseness — Closeness centrality
nwdegree — Degree centrality and distribution
nwevcent — Eigenvector centrality
nwinduced — Induced, endogenous and exogenous centrality
nwkatz — Katz-style distance-decay centrality
nwpagerank — PageRank centrality

Cohesion, components and subgroups

nwbridges — Find bridges (ties whose removal disconnects the network)
nwclique — Maximal clique enumeration
nwcohesion — Moody-White structural cohesion hierarchy
nwcomponents — Network components and the largest component
nwkcomponents — Maximal k-component enumeration
nwkcore — k-core decomposition
nwkplex — Maximal k-plex enumeration
nwnclan — Maximal n-clan enumeration
nwnclique — Maximal n-clique enumeration
nwsimmelian — Simmelian ties

Communities

nwcommunity — Detect communities via the Louvain method or label propagation
nwmodularity — Score an existing node partition using Newman’s modularity
nwspectral — Graph Laplacian spectral analysis

Positions, roles and similarity

nwbrokerage — Gould-Fernandez brokerage roles
nwburt — Burt’s structural-hole measures
nwconcor — CONCOR structural-equivalence blockmodel
nwconstraint — Burt’s constraint
nwcoreperiphery — Discrete core-periphery detection
nwdissimilar — Generate node dissimilarities
nwfactions — Partition nodes into a specified number of cohesive factions
nwhierarchy — Hierarchical clustering of nodes (role/position analysis)
nwshared — Number of shared neighbors of all pairs of nodes, as a network
nwsimilar — Generate node similarities
nwsimindex — Common-neighbor similarity indices between all node pairs

Clustering, mixing and balance

nw2clustering — Clustering coefficient (transitivity) of a two-mode network
nw2motifs — Bipartite motifs of a two-mode network
nw2nested — Nestedness of a two-mode network: NODF and C-score
nwassortativity — Newman’s assortativity coefficient
nwbalance — Structural balance of a signed network
nwclustering — Clustering coefficient (transitivity) of a network
nwmixing — E-I index and mixing table for a categorical node attribute

Paths, flows and ego networks

nwaltergen — Generate a variable from alter/neighbor attributes
nwego — Ego-network size and density
nwgeodesic — Calculate shortest paths between nodes
nwlambda — Edge (line) connectivity matrix between all node pairs
nwmatching — Maximum-cardinality bipartite matching
nwmaxflow — Maximum flow and minimum cut between two nodes
nwneighbor — Extract the network neighbors of a node
nwpath — Paths between nodes
nwrandomwalk — Mean random-walk hitting time to a target node
nwreach — Reachability network

Statistical tests

nwcorrelate — Correlate networks and variables
nwcug — Conditional Uniform Graph (CUG) test
nwqap — Multivariate QAP regression
nwutility — Utility scores of Jackson and Wolinsky (1996)

Other analysis tools

nwcontext — Create a context variable
nwnode — Check whether a node exists in a network
nwturnover — Tie turnover/stability between two waves of the same network
nwvalue — Return a tie value

Model packages (separate, GPL-3)

nwsaom — Stochastic actor-oriented models (SAOM) for network panels. Section: nwsaom
nwergm — Exponential random graph models (ERGM). Section: nwergm
nwdynam — Dynamic network actor models (DyNAM) for event data. Section: nwdynam
nwrem — Relational event models (REM) for event data. Section: nwrem

Utilities

nwclear — Clear all networks and variables from memory
nwcurrent — Report and set current network
nwerrorcodes — Return codes of nwcommands
nwinstall — Install the dialogs, menus and the model packages
nwload — Load a network as Stata variables
nwnetworktypes — How commands classify binary/directed/weighted/signed/two-mode networks
nworder — Reorder the networks in memory
nwversion — Version of nwcommands and of the installed model packages

Visualization

animate — Animate graphs
nwdendrogram — Plot a wheel dendrogram
nwmovie — Interactive, animated network movie (panel waves or a relational-event timeline)
nwmoviexy — Animate a sequence of networks (alias for nwmovie)
nwplot — Plot a network
nwplotmatrix — Plot a network as sociomatrix

Programming

nwcompressobs — Drop observations that no network needs
nwsync — Synchronize a network with Stata variables
nwtomata — Return the adjacency matrix of a network
nwtomatafast — Return a link to the adjacency matrix of a network
nwtostata — Copy a Mata matrix into Stata variables
nwunab — Unabbreviate network list
nwvalidate — Validate a network name
nwvalidvars — Validate Stata variables for a network