Omg omg! Search on "type III as R good or bad" or similar for why you should of should not be doing this. As for your specific question, I doubt that you'll get a useful reply until you post the code that elicited the error. Maybe not even then if it is due to estimability/overfitting of your data. And that you cannot obtain an aic seems unsurprising, as you said you cannot fit the model and so cannot get a likelihood and so cannot possibly obtain a penalized likelihood.
Or do I misunderstand? If so, please ignore. If not, my best advice would be to ignore all this SS business altogether and talk with a local statistician about how or if your data might answer scientific questions of interest. Cheers, Bert On Jul 16, 2016 6:16 PM, "Pamela Wong" <[email protected]> wrote: > Hi there > > I am trying to compute Type III SS plus model selection and find that an > error pops up when I'm trying to use the drop1() function with a model > output using Anova(). I am looking at effects of four factors and their > interactions (with unbalanced sample sizes across some factor groups), on a > continuous variable. > > I get an error that reads: "Error in terms.default(object) : no terms > component not attribute". I also can't compute an AIC for the model outputs. > > I am wondering if there is something I need to do to my data or if there > is some limitation to the analysis I am trying to do. > ______________________________________________ > [email protected] 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. > [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
