[R] plotting confidence bands from predict.nls

[Uwe Ligges]

Much quicker than asking for help on the list is to read the help file 
(which you have been asked to do in the posting guide you hopefully read).

?predict.nls tells us:

"interval 	A character string indicating if prediction intervals or a 
confidence interval on the mean responses are to be calculated. At 
present this argument is ignored."

Best,
Uwe Ligges




On 07.05.2011 06:17, Penny Bilton wrote:
> I am trying to find a confidence band for a fitted non-linear curve. I
> see that the predict.nls function has an interval argument, but a
> previous post indicates that this argument has not been implemented. Is
> this still true? I have tried various ways to extract the interval
> information from the model object without success. My code is:
>
> Model.predict <- predict(My.nls.model, se.fit=TRUE, interval =
> "confidence", level = 0.95) ,
>
> where My.nls.model is an nls object, I was able to extract the
> predictions okay.
>
>
> Thank you for your help.
> Penny.
>
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