Hi Doug, you can add the fitted curve using the following general paradigm:
## Plotting the data plot(p~z) ## Defining grid of z values ## (100 values ensures a smooth curve in your case) zValues <- seq(min(z), max(z), length.out = 100) ## Adding predicted values corresponding to the grid values lines(zVal, predict(fit, data.frame(z = zValues))) Christian ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
