[R] missing level of a nested factor results in an NA in lm output

[Erik Iverson]

>  > estimable(fit, myEstimate)
>      Estimate Std. Error  t value DF     Pr(>|t|)
> test 12.18198  0.6694812 18.19615 10 5.395944e-09

Where are you getting this "estimable" function from?  A package?  Did you define it yourself?