Package igraph0 deprecated and hence not able to access gspan package

Question

Hi am trying some examples from the book: Practical Graph mining with R for subgraph mining:

library(subgraphMining)
library(igraph)

graph1 = graph.ring(5)
graph2 = graph.ring(6)

database <- array(dim=2)
database[1] <- list(graph1)
database[2] <- list(graph2)

result <- gspan(database, support= "80%")

Getting the following error:

Error in library(igraph0) : there is no package called ‘igraph0’

This is probably because igraph0 is deprecated. So, do we need to tweak the functions in the subgraphMining package for using gspan in R; or is there any other way where I can point out to R that igraph0 is updated to igraph

Answer 1

igraph0 is not updated to igraph so you shouldn't do that. The key difference between igraph0 and igraph (apart from the fact that igraph0 is way outdated) is that igraph0 uses 0-based vertex and edge indices, while igraph uses 1-based indices. Simply using igraph in place of igraph0 won't work because packages depending on igraph0 expect vertex indices to start at zero.

The only sensible solution is to ask the maintainers of packages that still depend on igraph0 to upgrade to igraph. Alternatively, you can get igraph0 from the archives.