R help - Oct 2008 - fitting a curve to data points

Hello all. This is likely to be a silly question, but I have a set of
data points and I want to fit a curve to it, like this:
http://www.igc.usp.br/pessoais/guano/temp/curve.png.

which function should I use?

many thanks

Carlos

-- 
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
Linux User #89721  - carlos dot grohmann at gmail dot com
+-----------------------------------------------------------+
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judged
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Can't stop the signal.

On 7/10/2008, at 2:53 PM, Carlos Gu?no Grohmann wrote:
> Hello all. This is likely to be a silly question, but I have a set of
> data points and I want to fit a curve to it, like this:
> http://www.igc.usp.br/pessoais/guano/temp/curve.png.
>
> which function should I use?
Have a look at smooth.spline() and loess().

	cheers,

		Rolf Turner
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<carlos.grohmann <at> gmail.com> writes:
> 
> Hello all. This is likely to be a silly question, but I have a set of
> data points and I want to fit a curve to it, like this:
> http://www.igc.usp.br/pessoais/guano/temp/curve.png
While you could use a loess-curve, interpreting the rising branch a the 
end is probably close to cheating. I would simply guess that this is an
exp(-t/t0) curve with a few outliers. You should really have good reasons 
with so few datapoints in the upward branch.

Dieter