We are looking the extinction of a species of freshwater fish. The logistic regression was derived by scoring the anecdotal descriptions of the species' former population size (1 for a positive description of the population e.g. abundant, and 0 for a negative description e.g. scarce) and plotting this against time. Therefore it’s the population size relative to t=0. The anecdotal evidence in not regular and therefore why I used a derived measure of the population.
We then have the predictor variables temperature, oxygen and river modification for some of the 1800-2000 time period. Unfortunately the data is collected in bursts e.g. for the oxygen 1923-1938 and the 1954-1972, so the missing data will not be random. Best wishes, Tom -- View this message in context: http://n4.nabble.com/Survival-analysis-tp1559155p1559435.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
