I'm having some trouble with Anova() in package "car". When the model
formula is explicitly expressed:
library('nlme')
library('car')
fm <- lme(distance ~ age + Sex, data = Orthodont, random = ~ 1)
Anova() works fine:
Anova(fm)
However, if the model formula is scanned from an external source:
myModel <- as.formula("distance ~ age + Sex")
fm2 <- lme(myModel, data = Orthodont, random = ~ 1)
I get the following error:
Anova(fm2)
Error: object of type 'symbol' is not subsettable
How to resolve the situation when the model formula is defined externally?
Thanks,
Gang
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