Aan de slagGa gratis aan de slag

Reciprocity

The reciprocity of a directed network reflects the proportion of edges that are symmetrical. That is, the proportion of outgoing edges that also have an incoming edge. It is commonly used to determine how inter-connected directed networks are. An example of a such a network may be grooming exchanges in chimpanzees. Certain chimps may groom another but do not get groomed by that individual, whereas other chimps may both groom each other and so would have a reciprocal tie.

Deze oefening maakt deel uit van de cursus

Network Analysis in R

Cursus bekijken

Oefeninstructies

  • In this example network of chimps grooming each other, make an exploratory plot of the network g using plot(). Make the arrow size 0.3 using the argument edge.arrow.size and the arrow width 0.5 using the argument edge.arrow.width.
  • Calculate the reciprocity of the graph using reciprocity().

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

library(igraph)

# Make a plot of the chimp grooming network
plot(g,
     edge.color = "black",
     ___ = 0.3,
     ___ = 0.5)

# Calculate the reciprocity of the graph
___(g)
Code bewerken en uitvoeren