`nwsummarize`

Summarize a network

Syntax

nwsummarize 
[netlist]
[,
mat
matonly
detail
save(filename)
silent
]


`mat`	Display adjacency matrix of the network
`matonly`	Only display adjacency matrix of the network
`detail`	Calculate additional network measures: reciprocity, transitivity and the centralization measures (their `r()` results are only filled with `detail`); reciprocity is displayed as n/a for an undirected network (the stored `r(reciprocity)` is unchanged)
`save(filename)`	Save network measures in file
`silent`	Compute and return results without displaying anything

Description

nwsummarize calculates and displays a variety of network summary statistics. If no netlist is specified, summary statistics are calculated for the current network.

Examples

. nwwebuse florentine
. nwsummarize flomarriage
--------------------------------------------------
   Network name:  flomarriage
   Network id:  2
   Nodes: 16
   Directed: false
   Valued:  false
   Two-mode: false
   Selfloop: false
   Edges: 20
   Minimum value:  0
   Maximum value:  1
   Density:  .1666666666666667

. nwclear
. nwrandom 5, prob(.2) name(mynet)
. nwsummarize mynet, mat
--------------------------------------------------
   Network name:  mynet
   Network id:  1
   Nodes: 5
   Directed: true
   Valued:  false
   Two-mode: false
   Selfloop: false
   Arcs: 5
   Minimum value:  0
   Maximum value:  1
   Density:  .25

     1   2   3   4   5
  +---------------------+
1 |  0   0   0   0   1  |
2 |  0   0   0   0   0  |
3 |  0   0   0   0   1  |
4 |  0   0   0   0   0  |
5 |  1   1   0   1   0  |
  +---------------------+

Supported network types

Binary: yes. Directed: yes. Weighted: yes, dyad/triad/degree summaries reflect tie values where applicable. Signed: not checked. Two-mode: yes - shows the two levels with their sizes and labels; the density is the ties over the pairs of nodes from different modes (the connectance of bipartite).

Stored results

nwsummarize stores the following in r():

Scalars

r(id) internal ID of the network
r(nodes) number of nodes in the network
r(minval) minimum of tie values
r(maxval) maximum of tie values
r(edges) number of edges (undirected network)
r(arcs) number of arcs (directed network)
r(edges_sum) sum of edge values (undirected network)
r(arcs_value) sum of arc values (directed network)
r(density) network density (two-mode network: ties over the pairs between the two modes)
r(reciprocity) network reciprocity
r(transitivity) network transitivity
r(missing_edges) number of missing (undefined) dyads
r(selfloops) number of self-loops
r(nodes1) number of mode-1 nodes (two-mode networks only)
r(nodes2) number of mode-2 nodes (two-mode networks only)

Macros

r(directed) if network is directed or not (undirected)
r(valued) if network is declared as valued or not
r(mode2) if network two-mode or not
r(name) name of the network (alias: r(netname))
r(labs) comma-separated node labels
r(vars) Stata variable names used to represent the network
r(selfloop) if the network permits self-loops
r(provenance) provenance/source note, if set (see nwname)
r(temporal) if the network is temporal
r(temporaltype) temporal storage type, if r(temporal) is true
r(mode1_desc) description of mode 1 (two-mode networks only)
r(mode2_desc) description of mode 2 (two-mode networks only)

The full set above is inherited unchanged from the internal nwname call this command makes on your behalf - see nwname’s own Stored results section for the authoritative, complete list (this command does not add or remove any of it).

nwsummarize