Dear igraph users,
I have started to work with igraph and cannot find a way to solve two of my problems.
First of all when plotting my graph I have noticed isolated edges (two nodes connected just to each other and having no
connection to the main graph). I now how to delete nodes that have no edges at all but is there a way to delete isolated
edges?
Secondly I have a data frame with 8 columns each representing a node attribute (except first column). I wanted to add those
attributes to the nodes and tried this option;
g <- set.vertex.attribute(g, "x", index=V(g), value = n[,2])
The problem is I am not quite sure is how to assign a proper attribute to proper node. The first column of the table has the
ID that correspond to the node names I used when
creating the graph. Any ideas how to add all 7 columns to proper vertices?
Also when I try to print the graph with the attributes using
print(g, vertex.attributes=igraph.par("print.vertex.attributes"), names=TRUE, quote.names=TRUE)
all I get is edges information and no attributes. What command should I use to print each node with corresponding attribute
and not a list of edges (I used adjacency matrix to create the graph)?
Thanks very much for help.
Peter