David Hugh-Jones wrote:
> Hello all
>
> I have a fit resulting from a call to glm.
Now, now, no reason to overreact...
("Women can have fits upstairs" -- sign in Indian tailor shop)
> Now, I would like to extract the
> model frame MF, and add some variables
> from the original data frame DF. To do this, I need to know which rows in DF
> correspond to rows in MF (since some were dropped by na.omit). How can I do
> this? It's probably simple but the information is hard to find.
na.omit leaves a footprint in, e.g.,
attr(na.omit(airquality),"na.action"). This can be used for (negative)
indexing.
--
O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907
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