Dear Joseph

I understand that you are asking me to change the values of A0, A1 and A2 to get curve acceptable. If i get a curve with the error count is within + or - 10 counts, then it is ok.

Now i am including the graphs plotted for different factors,counts and weights in the below link.

http://www.8052.com/users/Nagarajan/CURVEFITR1.xls

If this is not intended then kindly explain me the procedure.

Finally i really appreciate your help towards me.

V.Nagarajan.

PS
Can i divide curve regeion into three parts and find curve fits for each separetely?