[igraph] centroid measure

[MATSUDA, Noriyuki]

Hello:

   I recently came across with the centroid measure: e.g.,
      Smart and Slater (1999) Center, median and centroid subgraphs.
          Networks, Vol. 34 (4), 303-311
         
http://www3.interscience.wiley.com/journal/66005715/abstract?CRETRY=1&SRETRY=0
   Is there a way to compute this in igraph?

Thanks in advance.
_________________________________
MATSUDA, Noriyuki