convert unsigned projection to signed

as_signed_proj(g)

Arguments

g

igraph object

Value

igraph object

Author

David Schoch

Examples

library(igraph)
#> 
#> Attaching package: ‘igraph’
#> The following objects are masked from ‘package:stats’:
#> 
#>     decompose, spectrum
#> The following object is masked from ‘package:base’:
#> 
#>     union

# create a simple signed two mode network
el <- matrix(c(1,"a",1,"b",1,"c",2,"a",2,"b"),ncol = 2,byrow = TRUE)
g <- graph_from_edgelist(el,directed = FALSE)
E(g)$sign <- c(1,1,-1,1,-1)
V(g)$type <- c(FALSE,TRUE,TRUE,TRUE,FALSE)

# convert to unsigned two-mode network and project
l <- as_unsigned_2mode(g,primary = TRUE)
p <- bipartite_projection(l,which="true")

# turn the unsigned projection back to a signed network
as_signed_proj(p)
#> IGRAPH 366402c UN-- 3 3 -- 
#> + attr: name (v/c), type (e/c)
#> + edges from 366402c (vertex names):
#> [1] a--b a--c b--c