[igraph] to attach edge weights

[MATSUDA, Noriyuki]

Hello:

   I'd be happy if any one can tell me how to attach edge weights on
the basis of a connectedness/similarity matrix.  Suppose I do the
following for a 3 by 3 correlation matrix
   m<- rbind(c(1, 0.2, 0.6), c(0.2, 1, 0.8), c(0.6, 0.8, 1))
   m(diag)<-NA;
   m[m(a)<0.5] <-0;  m[m(a)>=0.5] <-1  #There must be a better way
   g<-graph.adjacency(m, mode="upper"] #upper includes diagonals
   E(g)$weight ???????

Thanks in advance
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MATSUDA, Noriyuki　<in Kanji> 松 田 紀 之