Is the network signed?

Check if the network is signed

is_signed(x)

Arguments

x

graph object

Value

logical, TRUE or FALSE

Details

A signed igraph or network object has a "sign" attribute.

For a matrix or data.frame, a signed network is recognized by the presence of positive and negative ties, where values are integers. A signed graph that only has positive integer values will not be recognized as such (but is pathologial anyway).

Specifially, for a data.frame, this check is conducted on its third column, which is the most logical column to hold the signs.

References

functions from the excellent migraph package. These methods are licensed through the MIT license in combination with copyright for James Hollway.

Examples

data(florentine, package = "snafun")
is_signed(florentine$flobusiness)   # FALSE
#> [1] FALSE