"incidence matrix" naming should be changed to "biadjacency matrix"

[szhorvat]

Mirroring igraph/igraph#2326, any function names referring to an "incidence matrix" should be changed to say "biadjacency matrix".

This affects at least as_incidence_matrix() and graph_from_incidence_matrix().

In the future, the name "incidence" matrix will be used for edge-vertex incidence matrices.

@krlmlr @maelle Up to you when you start adding aliases in preparation for a future deprecation (and eventual repurposing) of the "incidence" names.

[maelle]

I hope to get to this next week, slowly going through my backlog, sorry for the delay. 🙏

[szhorvat]

Thanks so much for all the help so far @maelle ! If there's any issue when you pinged me but I failed to respond, please ping again. I think I looked at everything now.

[maelle]

exports <- getNamespaceExports("igraph")
grep("incidence_matrix", exports, value = TRUE)
#> [1] "from_incidence_matrix"       "as_incidence_matrix"        
#> [3] "graph_from_incidence_matrix"

^{Created on 2023-11-13 with reprex v2.0.2}

[szhorvat]

Yes, all three.

[github-actions]

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