Hi Josephine, Given the parameters you describe, you will probably have to write a function to update the database of animals at regular intervals. You can then run a number of repeats to get a better estimate of the final populations. I tried this and it appears to work. I don't know of any existing package that will accomplish something this specific.
Jim ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.