[R] curve fitting to data

[Pascale Weber]

Hi to all

This is the first time I am quoting a question and I hope, my 
question is not too basic...

For the following data, I wish to draw a fitted curve.

x <- c(123,129,141,144,144,145,149,150,158,159,163,174,183,187,242,248)

y <- 
c(14.42,26.96,31.3,19.95,36.36,15.4,24.76,35.39,28.07,40.97,26.23,42.83,46.53,14.79,49.18,48.08)

If I plot the data, it looks somehow that a logistic function would 
render good results.

My questions are:

How do I use
  nls and/or SSlogis (or other)
to fit the curve?

How can I see the summary statistics of the fit?

How do I finally draw the line to my x,y (untransformed data) plot?

Any help would be highly appreciated.

Thank you and cheers

Pascale

-- 
____________________________________..___________________

Dr. Pascale Weber
Swiss Federal Research Institute WSL
Zuercherstrasse 111
CH-8903 Birmensdorf
Switzerland