Combining two sets of data

[mishery]

I have two sets of data I want to combine and analyse together in
linear mixed model. However data set two has one extra variable that
is a highly significant predictor and I can't seem to work out how to
combine the data sets taking into account the extra variable in data
set two.

Any help greatly received

Thanks

- Mike

[Stefan Th. Gries]

Without a specific example, this is difficult to answer: how do the
dataframes look like, how do you want to merge the data etc. Maybe
this provides some first help:
<http://groups.google.com/group/corpling-with-r/browse_thread/thread/585ecd4965720178>
STG
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Stefan Th. Gries
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University of California, Santa Barbara
http://www.linguistics.ucsb.edu/faculty/stgries
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