You're going to have to use nonlinear techniques, since there is no transformation which I know of which will get you into any form on which you can use ordinary least squares. Most of the techniques I am familiar with are iterative and best done by a computer.
"Konrad Den Ende" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Suppose you know that a process follows a function > y(t) = a + b e^-x, t >= 0. > ALso, suppose you have following data. > t: { 0, 1, 2, 3 } > y: { 2.2, 1.4, 0.87, 0.44 } > > How does one estimate the values of a and b? > > I have estimated a+b to be 2.2 but i'm not to happy with that. Also, i have > very little to say about how to estimate a or b alone. Anybody having a > helping hand here? > > -- > > Kindly > Konrad > --------------------------------------------------- > May all spammers die an agonizing death; have no burial places; > their souls be chased by demons in Gehenna from one room to > another for all eternity and more. > > Sleep - thing used by ineffective people > as a substitute for coffee > > Ambition - a poor excuse for not having > enough sense to be lazy > --------------------------------------------------- > > > > . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
