Second-zone multilevel sampling considering a second-mode focal actor
Arguments
- A
A symmetric matrix object.
- X
X an incidence matrix object.
- ego
Whether to add or not ego into the subgraph.
- core
Whether to add actors at distance one from ego
Value
This function return a list of second-zone subgraphs using as a focal actor the second-mode of the multilevel network.
References
Espinosa-Rada, A. (2021). A Network Approach for the Sociological Study of Science: Modelling Dynamic Multilevel Networks. [PhD]. The University of Manchester.
Examples
A <- matrix(c(
0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0,
0, 1, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
), byrow = TRUE, ncol = 8)
colnames(A) <- c("1", "2", "3", "4", "5", "6", "7", "8")
rownames(A) <- c("1", "2", "3", "4", "5", "6", "7", "8")
X <- matrix(c(
1, 0, 0, 0,
1, 0, 0, 0,
1, 0, 1, 0,
0, 1, 1, 0,
0, 1, 1, 1,
0, 1, 0, 0,
0, 0, 0, 0,
0, 0, 0, 1
), byrow = TRUE, ncol = 4)
colnames(X) <- c("a", "b", "c", "d")
rownames(X) <- c("1", "2", "3", "4", "5", "6", "7", "8")
set.seed(18051889)
zone_sample(A, X, core = TRUE)
#> $a
#> IGRAPH 547747f DN-- 7 16 --
#> + attr: name (v/c), core (v/n)
#> + edges from 547747f (vertex names):
#> [1] 1->2 1->a 2->3 2->a 3->2 3->4 3->a 3->c 4->b 4->c a->1 a->2 a->3 b->4 c->3
#> [16] c->4
#>
#> $b
#> IGRAPH c6b780e DN-- 8 18 --
#> + attr: name (v/c), core (v/n)
#> + edges from c6b780e (vertex names):
#> [1] 3->4 3->a 3->c 4->b 4->c 5->b 5->c 5->d 6->4 6->b a->3 b->4 b->5 b->6 c->3
#> [16] c->4 c->5 d->5
#>
#> $c
#> IGRAPH b531402 DN-- 9 22 --
#> + attr: name (v/c), core (v/n)
#> + edges from b531402 (vertex names):
#> [1] 2->3 2->a 3->2 3->4 3->a 3->c 4->b 4->c 5->b 5->c 5->d 6->4 6->b a->2 a->3
#> [16] b->4 b->5 b->6 c->3 c->4 c->5 d->5
#>
#> $d
#> IGRAPH 25b5142 DN-- 5 8 --
#> + attr: name (v/c), core (v/n)
#> + edges from 25b5142 (vertex names):
#> [1] 5->b 5->c 5->d 8->d b->5 c->5 d->5 d->8
#>