About igraph releases and other things

C/igraph 0.9.4

C/igraph 0.9.4, the fourth bugfix release of the 0.9 series, has arrived.

The source can be obtained from the GitHub releases page.

This release includes bug fixes only.


  • Unweighted transitivity (i.e. clustering coefficient) calculations now ignore multi-edges and edge directions instead of rejecting multigraphs and directed graphs.
  • igraph_transitivity_barrat() now returns an error code if the input graph has multiple edges (which is not handled correctly by the implementation yet).


  • igraph_local_scan_k_ecount() now handles loops correctly.
  • igraph_transitivity_avglocal_undirected() is no longer slower than igraph_transitivity_local_undirected().
  • Worked around an invalid warning issued by Clang 9.0 when compiling with OpenMP.


  • Documentation improvements.