On May 5, 2011, at 1:45 PM, dereksloan wrote:
Thanks a lot,
I understand what you say but I'm having problems - maybe with the
syntax or
the specific command.
You are right - I have a dataframe to store the data and want to
automate
the analysis.
i.e. I want do a chisq.test with to know if alcohol intake (Y/N)
differs
between sexes, then if smoking (Y/N) differs between sexes, then if
alcohol
intake or smoking differ by hiv status.
The command within my data frame for each individual comparison is
e.g.
chisq.test(alcohol,sex)... then repeat it for all combination of
variables.
I don't generally answer questions that support shotgun approaches to
manufacturing p-values for fear of encouraging unprincipled data-
ming ... unless it is clear that the questioner understands what he
are doing from a statistical point of view. So my apologies. I
probably shouldn't have even posted in this case. I misunderstood the
question and thought it was just a quick syntactic fix. I now
understand it to be more involved and really demands more care and
respect than I was giving it.
but using lapply I'm still unsure how to design the loop.
I'll keep trying - let me know if you have more ideas.
Derek
--
David Winsemius, MD
West Hartford, CT
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