multilevel.community fails to report modularity if weights are real numbers
Bug #1149658 reported by
chaosbringer
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| igraph |
Fix Committed
|
Undecided
|
Gábor Csárdi | ||
Bug Description
The summary says it all. Graph-file attached.
library(igraph)
g<-read.
E(g)$weight<
com<-multilevel
modularity(com)
[1] -Inf
Warning message:
In max(x$modularity) : no non-missing arguments to max; returning -Inf
Revision history for this message
| chaosbringer (chaosbringer) wrote | #1 |
| description: | updated |
Revision history for this message
| Gábor Csárdi (gabor.csardi) wrote | #2 |
Revision history for this message
| Gábor Csárdi (gabor.csardi) wrote | #3 |
| Changed in igraph: | |
| status: | New → Fix Committed |
| assignee: | nobody → Gábor Csárdi (gabor.csardi) |
Revision history for this message
| Gábor Csárdi (gabor.csardi) wrote Continue on github | #4 |
To post a comment you must log in.
OK, this happens, because the each vertex ends up in its own community, and in this case the modularity vector returned by the C level is empty. So this is a bug in the C function.