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formulation
2007 Dec 28
3
How to catch data from the different dataframes and lm problem?
Dear all:
I am a new R-user and I have 2 questions
about it.
1) I have a dataframe. Based on ?formulation? and ?subject?, a
dataframe is split into 4 dataframes. The
example is as follows. Moreover, I want
to calculate ?test? value for these 4 dataframes. My question is that the ?test? values not
correct and I do not know where the problem is.
2) There are 12 ?test? (y) values from