No, it isn't correct I'm afraid. From what you describe, Population isn't nested within Sex or Maturity. Population 1 can contain both male and female trees, as well as trees of different ages.
A simpler model would be lm (PAC ~ Season + Population + Sex + Maturity) So that Sex and Maturity have the same effect in each population. If you think their effects vary between populations, then you would want lm (PAC ~ Season + Population*Sex + Population*Maturity) which is the same as lm (PAC ~ Season + Population*(Sex + Maturity)). Bob On Tue, 2 Jul 2019 at 15:27, Eleftheria Dalmaris <edalma...@gmail.com> wrote: > > Dear all, > > I have a blocking and nested design. > I have Season (3 levels; three different collection periods). That's my > Block. > I have three Populations that I sampled from (Plant material) > From each population, I sampled 30 trees. > Each Tree is either Female or Male or Unidentified (Sex factor) and > Each tree is either Juvenile or Mature or Old (Maturity factor) > > Maturity factor and Sex factor is not balanced within the population. > > So, Population is nested within Sex and Maturity > > I measure a chemical from the leaves of those trees with the name of PAC. > > Is the way that I write the code correct? > lm (PAC ~ Season + Population+ Sex/Population + Maturity/Population) > > Thanks a lot, > > Eleftheria > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. -- Bob O'Hara Institutt for matematiske fag NTNU 7491 Trondheim Norway Mobile: +47 915 54 416 Journal of Negative Results - EEB: www.jnr-eeb.org ______________________________________________ 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.
