[R] Rgraphviz: Setting the edge width

From: Søren Højsgaard <Soren.Hojsgaard_at_agrsci.dk>
Date: Fri 07 Jul 2006 - 09:42:35 EST

I create an undirected graph with Rgraphviz (see code below). I would like to make the edges thicker. Can anyone help on this?? Regards

   V <- c("A","B","C","D")
   E <- list(c("A","B"),c("B","C"),c("C","D"),c("D","A"),c("A","C"))    Eidx <- lapply(E, match, V)
   edL <- vector("list", length=length(V))    names(edL) <- V
   for (i in 1:length(Eidx)){

     tmp <- Eidx[[i]]
     edL[[tmp[1]]]$edges <- c(edL[[tmp[1]]]$edges, tmp[2])
     edL[[tmp[2]]]$edges <- c(edL[[tmp[2]]]$edges, tmp[1])
   G <- new("graphNEL", nodes=V, edgeL=edL)    nAttrs <- list()
   nAttrs$fillcolor <- c("red","red","blue","blue")    names(nAttrs$fillcolor) <- V
   eAttrs <- list(color = c("A~B" = "green", "B~C" = "green", "C~D" = "yellow",

      "A~C" = "yellow"))
   plot(G, "neato", nodeAttrs = nAttrs, edgeAttrs = eAttrs)

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