Hello I have some test data that looks like that from a within subject experiment. Subject Task-Kind Data-Kind Time-Taken Correct 1 A Data1 5 1 1 A Data1 3 0 1 A Data1 1 1 1 A Data2 8 1 1 A Data2 7 0 1 A Data2 5 0 1 A Data3 2 1 1 A Data3 7 0 1 A Data3 5 0 1 A Data3 6 0 1 B Data1 3 1 1 B Data1 1 1 1 B Data1 3 0 1 B Data2 9 0 1 B Data2 8 1 1 B Data2 5 0 1 B Data3 2 1 1 B Data3 7 2 1 B Data3 5 3 1 B Data3 6 0 1 C Data1 3 1 1 C Data1 1 1 1 C Data1 3 0 1 C Data2 9 0 1 C Data2 8 1 1 C Data2 5 0 1 C Data3 2 1 1 C Data3 7 2 1 C Data3 5 3 1 C Data3 6 0 2 A Data1 5 1 2 A Data1 3 0 2 A Data1 1 1 2 A Data2 8 1 2 A Data2 7 0 2 A Data2 5 0 2 A Data3 2 1 2 A Data3 7 0 2 A Data3 5 0 2 A Data3 6 0 2 B Data1 3 1 2 B Data1 1 1 2 B Data1 3 0 2 B Data2 9 0 2 B Data2 8 1 2 B Data2 5 0 2 B Data3 2 1 2 B Data3 7 2 2 B Data3 5 3 2 B Data3 6 0 2 C Data1 3 1 2 C Data1 1 1 2 C Data1 3 0 2 C Data2 9 0 2 C Data2 8 1 2 C Data2 5 0 2 C Data3 2 1 2 C Data3 7 2 2 C Data3 5 3 2 C Data3 6 0 . . .
some notes: there are 20 subjects there are 5 different kinds of tasks There are 5 different kinds of data and there are several different variations for a certain kind of task and kind of data which is why for Subject = 1 Task-Kind=A and Data-Kind=Data1 we have 3 different results. The measured parameters are time to complete the task and whether it was correct or not (0 implies correct and 1 implies not correct) I am computing the anova as follows: aov.ex = aov(Correct~Task-Kind*Data-Kind+Error(Subject/(Task-Kind*Data-Kind)),data=allDataRaw.xp) since I want to see how the result is affected by the different kinds of data as well as the the kind of task and I get a warning message saying: Error() model is singular I would be very grateful if someone could please tell me what does this mean. Thanks Pascal -- View this message in context: http://r.789695.n4.nabble.com/Error-model-is-singular-what-does-that-mean-tp4635103.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.
