Hi,
I have a model that I fit from data with some NAs in it.. everything is
going well until I try to plot observed vs fitted.. and I can figure out
how to fix this.. any ideas?  I can see that there are 1049 observed and
1050 fitted.. but can I resolve this without fitting new models after
discarding NAs?  I would really rather not do that.

>plot(model, resp~ fitted(.))
Error in `[<-.data.frame`(`*tmp*`, , ".y", value = c(130.983333333333,  :
  replacement has 1050 rows, data has 1049

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