Message-ID: <51237A3F.1020006@statistik.tu-dortmund.de>
Date: 2013-02-19T13:12:31Z
From: Uwe Ligges
Subject: Using lm to estimate a parameter?
In-Reply-To: <CADXo224kwwZDXG92qdCA86Yin_AprreEBLPF56xk-U-kBV2Oew@mail.gmail.com>
On 19.02.2013 11:23, hellen wrote:
> Hi,
> I have a data with three variables (X,Y,Z) and I have an equation as
> Z=X/(1+L*X/Y) where L is a constant which need to be estimated from data.
> How should I write the formula in lm or is it possible to fit a linear
> model in this case?
Neither, it is nonlinear in the parameters. See ?nls or ?optim, for example.
Uwe Ligges
>
> Thanks!
> Hallen
>
> [[alternative HTML version deleted]]
>
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