Collect graphs measures and indices

[ambitious-octopus]

We need to calculate and collect graph measures and indices in the next release. Proposals?

[mariopaolucci]

Found the paper I was looking for! https://doi.org/10.1007/s12599-010-0127-3. It's also in the Zotero library.

So the classic sequence is:

basics:
number of nodes
number of links
distribution of degrees (maybe even just a five-values summary)
clustering coefficient (mean? five-values?)

connectedness

number of components
only if the number of components is one or about one
size (longest path)

centrality measures (see paper). But for what points?