Ego network

Submatrix of ego's neighbourhoods

Usage

ego_net(
  A,
  ego = NULL,
  bipartite = FALSE,
  addEgo = FALSE,
  select = c("all", "in", "out")
)

Arguments

A

A symmetric matrix object

ego

Name of ego in the matrix

bipartite

Whether the matrix is a two-mode network

addEgo

Whether to retain ego in the submatrix or not

select

Whether to consider all sender and receiver ties of ego (all), only incoming ties (in), or outgoing ties (out). By default, all.

Value

This function returns the submatrix of the alters of ego, with ego in the last row and column when addEgo = TRUE. An isolate gives an empty matrix (or a 1 x 1 matrix with ego).

References

Burt, R.S., 1992. Structural Holes: the Social Structure of Competition. Harvard University Press, Cambridge.

Borgatti, S., 1997. Unpacking Burt's redundancy measure. Connections, 20(1): 35-38.

Author

Alejandro Espinosa-Rada

Examples

A <- matrix(c(
  0, 1, 0, 0, 1, 1, 1,
  1, 0, 0, 1, 0, 0, 1,
  0, 0, 0, 0, 0, 0, 1,
  0, 1, 0, 0, 0, 0, 1,
  1, 0, 0, 0, 0, 0, 1,
  1, 0, 0, 0, 0, 0, 1,
  1, 1, 1, 1, 1, 1, 0
), ncol = 7, byrow = TRUE)
rownames(A) <- letters[1:nrow(A)]
colnames(A) <- letters[1:ncol(A)]
ego_net(A, ego = "g")
#>   a b c d e f
#> a 0 1 0 0 1 1
#> b 1 0 0 1 0 0
#> c 0 0 0 0 0 0
#> d 0 1 0 0 0 0
#> e 1 0 0 0 0 0
#> f 1 0 0 0 0 0