[R] Prediction and confidence intervals from predict.drc

R-helpers, I am using the package drc to fit a 4 parameter logistic model. When I use the predict function to get prediction on a new dataset, I am not getting the requested confidence or prediction intervals. Any idea what is going on? Here is code to reproduce the problem: ---

Re: [R] Prediction and confidence intervals from predict.drc

On Sep 6, 2010, at 7:54 PM, Brant Inman wrote: R-helpers, I am using the package drc to fit a 4 parameter logistic model. When I use the predict function to get prediction on a new dataset, I am not getting the requested confidence or prediction intervals. Any idea what is going on?