FYI: https://github.com/igraph/igraph/tree/feature-int-igraph_t
Gabor On Wed, Nov 4, 2015 at 11:12 PM, Tamas Nepusz <[email protected]> wrote: > Ah, sorry, just realized that igraph_t contains igraph_vector_t > objects, and those indeed contains doubles. Yes, you are right, this > is weird, and this is a heritage from the old days when > igraph_integer_t was also typedef'd to a double. Just for fun I have > changed the types in igraph_t to igraph_vector_long_t and made a few > quick modifications to src/type_indexededgelist.c to make things > compile without warnings, and it seems to do the trick - all tests > compile just fine. However, there are probably lots of unnecessary > casts left in the code, and of course we cannot change the public API > (which still uses igraph_vector_t in lots of cases to store vertex > lists) without breaking everyone else's code, so this quirk is > probably here to stay for while (unless Gabor makes an executive > decision and decides to break the API intentionally). > > If anyone is interested in it, I have pushed the changes into a > separate branch named feature/graph_t-with-long-vector. > > T. > > T. > > > On Wed, Nov 4, 2015 at 11:18 PM, Tamas Nepusz <[email protected]> wrote: >>> Why does igraph use floating point data (C doubles) to represent graph >>> vertices? It seems like an unusual choice and I would expect it to >>> negatively affect performance. Is it an R heritage? >> Errrrm... it used to be that way a (not so) long time ago; see this >> thread on the mailing list: >> >> https://lists.nongnu.org/archive/html/igraph-help/2009-01/msg00119.html >> >> However, I have just checked the source code and igraph_integer_t is >> now typedef'd to an int so this is probably not the case any more. >> >> T. > > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
