[igraph] Help required regarding igraph plot

[Shailesh Tripathi]

Dear Sir

This is Shailesh Tripathi, PhD Student in Queen's University Belfast. I am 
using igraph package for analyzing networks. The size of our network is very 
large and I want to plot networks in a certain pattern, tkplot function in 
igraph provides limited option to plot a network. for this reason i want to set 
the coordinates of each node on my own. Is there any function available in 
igraph which can be used to  set the coordinates of each vertex of a graph 
object. If this function is not available externally would you mind to let me 
know how to access the code to set the coordinates of each node of a  graph 
object while plotting.

waiting for reply

Thanks and Regards
Shailesh Tripathi