[igraph] Problems about igraph-c library generating layouts for graph

[李甜]

Hello:

 I found some problems when I used the igraph-c library generating layouts for graph.When I used the igraph-layout-random and the igraph-layout-frucherman-

reingold the matrix object which contains the result is zero.It cann't layout the graph.I don't know why,so I want to ask about it.

 I'm looking forward to your reply.Best regards.

                                                                                            Tian Li