non linear regression algorithm

hello all,

I am looking for a non linear regression algorithm to find constants (a,b,c,d) for my function

Y=Exp^(a*x+b)+Exp^(c*x+d)

Where Y and X i have the data

Using non linear regression i need to find the constants which would be the best guesses

Could some body provide some informations.

Regards biji

[352 byte] By [baijupaca] at [2007-11-27 4:04:45]