[R] Error() model is singular - what does that mean
Jessica Streicher
j.streicher at micromata.de
Mon Jul 2 15:04:41 CEST 2012
Also, try googling for - R model is singular - , there seem to have been a lot of people with that particular error.
On 02.07.2012, at 14:56, Jessica Streicher wrote:
> Just looking at it i would try renaming Task-Kind, Data-Kind an Time-Taken
> Those are ambiguous in the Formula.
>
> "Task-Kind" vs "Task" - "Kind"
>
> Though that might not be the error at hand :)
>
>
> On 02.07.2012, at 14:15, zetwal wrote:
>
>> 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.
>>
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>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
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