Xgraph Manual?

[K Sun <ksun@essex.ac.uk>]

Hello,
    I am interested in Xgraph, but I do not know the relation between 
Xgraph and the outcomes of ns (for example, is there any connection 
between Xgraph and the trace file of ns?)
    I have read the examples which are attached in Xgraph so that I 
just have a little impression how to draw a simple graph with those 
commands. However, is it possible to automatically produce a xgraph 
file and xgraph can give a direct display of the simuation outcome of 
ns?
     In the mail archive, there is one in which Xgraph Manual has been 
mentioned. Does it means the xgraph.man or another Doc? If it is 
another Doc, does it has the answer of my question?

     Thanks in advance!

      Sun Kai