On Jun 29, 2010, at 1:10 PM, GL wrote:
dbs is an existing dataframe. I fit a lm and looked at influential
observations. I want now to delete the influential observations from
dbs,
fit another lm, and see how different the results are. What is the
syntax to
remove the influential observations from dbs?
fit <- lm(NI ~ PG + log(TG), data=dbs)
fit.influential.observations <- influence.measures(fit)
dbs.without.influential.observations <- ?????
Look (more?) carefully at the examples on the help page. The first
example shows how to extract a vector of row numbers associated with
infuential cases. If you need help applying htat information to a
dataframe using "[" then you probably need to re-read the Introduction
to R as well.
--
David Winsemius, MD
West Hartford, CT
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