I'm looking for a solution to perform network analysis among my data set.
My database is shaped like this :
Table 1 :
Species a | Species b | Species c | Species x | Relevé 1| NA 2 2 4 Relevé 2| 3 NA 1 1 Relevé 3| 1 2 5 NA Relevé x| 5 1 1 NA
In first column are relevé ID (unique for each plot sampled) and in row cover abundance of species if seen in the plot, or NA if not seen.
From this database I would obtain a table which will allow me to analyse links between each species like:
Species1 | Species2 | Strenth (number of time the link exists)
Example (according to Table 1):
Species a | Species b | 2 Species a | Species c | 3 Species a | Species x | 1 Species b | Species a | 2 Species b | Species c | 3 Species b | Species x | 1 Species c | Species a | 3 Species c | Species b | 3 Species c | Species x | 2 ...
The links between species are considered as true if they coexist in at least one relevé.
If someone knows how to do that, it would be helpful!