[igraph] Thoughts on consistency in functions

[Magnus Torfason]

I just sent in the functions 'get.edges.as.data.frame()' and 
'get.vertices.as.data.frame()'. While writing them I thought that there 
really should exist two functions, get.edges() and get.vertices() that 
return the information in the simplest structures possible (matrix for 
get.edges() and vector for get.vertices()). The functions could have the 
following definitions (with defaults chosen for backwards compatibility 
and consistency):

get.edges <- (graph, es=E(graph), names=FALSE) {...}

get.vertices <- (graph, vs=V(graph), names=FALSE) {...}

Then, get.edgelist() could be deprecated and its definition could also 
be simplified:

get.edgelist <- (graph, names=TRUE)
{
    get.edges(graph, es=E(graph), names=names)
}

This is just a thought, I may be missing some detail about the 
difference between get.edges() and get.edgelist(), and there may be 
performance implications, but I thought I'd share it anyway.

Best,
Magnus