[R] Plotting Rickers curve in R with confidence intervals

Hello, I am both new to this forum and to R. Therefore apologies if I am posting a request for help for something overly simple and/or that has already been covered in past posts. I would really appreciate some simple and straightforward help on how to plot a Rickers growth curve with confidence

[R] logLik calculations

Does the “logLik” function applied to a “glm” and “glm.nb” (from MASS package) calculate the complete log-likelihoods, or does it drop the constant terms of the equation? (It’s not clear from the associated help pages, and I’ve found no reference from searching the R help mailing list) Thank you,

[R] using "logLik" with AIC to compare models with different error

Hi there, I’d like to use AIC to compare between models with different error distributions (eg: Dick 2004, Sileshi 2004, Burnham and Anderson 2002), namely a normal, Poisson and negative binomial. I realize there are differing views whether this is valid or not from reading past R help postings; h