Dear all,
I would like to find a linear regression model for a rather large dataset
(27 independent variables). However, when I run lm the following error is
reported:
> out <- lm(Result ~ AppealA + AppealsB + AppealC + AppealD + AppealE +
Apply + ApplyAmount + Aprove + Closecase + Decidelocally + Healthassessment +
HealthassessmentHealth + Postponedecision + Propertyassessment +
PropertyassessmentPropertyvalue
+ RejectA + RejectB + RejectC + RejectD + RejectE + Reportacceptance +
+ ReportrejectionA + ReportrejectionB + ReportrejectionC + ReportrejectionD +
+ ReportrejectionE + Timeout)
Error in `contrasts<-`(`*tmp*`, value = "contr.treatment") :
contrasts can be applied only to factors with 2 or more levels
I've checked the documenation but somehow I fail to find an explanation
what does it mean...
Thanks in advance,
Alexander Serebrenik
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