Hi Yuzhi...I'm not sure if you company gets involve with small project-but I figure I send the e-mail and maybe you could point me in the right direction. We are a small technology research firm and we do market shares and market sizing. We wanted to automate teh process better. We had hire a consultant who develoepd all of the equations for us and process, I have all of the details, the problem we have is that the consulatnt came down with cancer and he has a tough battle ahead of him---he never got a chance to convert it to excel and R so we could use it. Does your company have person that would get involve to finish this project for us-if not any recommendations would be helpful I'm sorry for sending it to this since I wasn't sure which one ot sedn it to, Thanks so Much Ray 616-802-0896