[Tugindia] How to convert graph file into a EPS file?

[yuwaraj m ghugal]

 Dear Sir,

    I want to include some graphs in the latex text file. Please tell me how to convert any graph file into a EPS file. What is the command for inclusion of graph files? For example I want to include sigmax.grf  into my latex document, how it is to be carried out?
Kindly help me. 

Dr. Y. M. Ghugal, Aurangabad,
E-mail:ghugal at rediffmail.com