[R] how to draw confidence interval lines of a fitted curve of polynominal regression

[Eik Vettorazzi]

Hi Elaine
you can do all at one go using the ggplot2-package

library(ggplot2)
qplot(age,weight)+ geom_smooth(method="lm",formula=y~poly(x,2))

Have a look at ?geom_smooth when you want to incooperate customized
model predictions

cheers.

Am 07.02.2013 02:31, schrieb Elaine Kuo:
> Hello,
> 
> I drew a plot of weight and height of people and fitted it with a
> polynominal regression x^2.
> (using curve())
> 
> Now I would like to draw the confidence interval line for the fitted curve.
> Please kindly advise the code for the purpose.
> Thank you.
> 
> Elaine
> 
> 	[[alternative HTML version deleted]]
> 
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