# Cocitation() bibcoupling() and weights

A simple presentation of cocitation () and bibcoupling() functions

1 Like

Demostration of fundamental terms of scientometric analysis

1. What is citing article, what is cited article ?

2)You will learn how to develop relations between articles who to not cite each other

1. What is co-citation ?

2. how to use igraph library in R to visualize co-citation Netwroks

For a more advanced take on weights in co-citations and bibliographic coupling, you may want to take a look at this article. The authors (colleagues of mine) suggest that normalising the weights by â€śfractionalizingâ€ť the weights might make more sense in some circumstances. That is, normally, the weight in bibliographic coupling between node i and j is defined as

w_{ij} = \sum_k A_{ik}A_{jk},

where A_{ik} = 1 if node i cites node k and 0 otherwise. With fractionalization, this would be defined as

w_{ij} = \sum_k \frac{A_{ik}A_{jk}}{d_k - 1}

where d_k = \sum_i A_{ik} is the in-degree of node k, or the number of times k is cited in this case.

Perhaps it would be of interest to also support this definition in igraph.

1 Like