[R] Chi Square with two tab-delimited text files

Carina Brehony carina.brehony at zoology.oxford.ac.uk
Mon Feb 26 12:57:44 CET 2007


Yes, I would like to do a goodness-of-fit test.

-----Original Message-----
From: Petr Klasterecky [mailto:klaster at karlin.mff.cuni.cz] 
Sent: 26 February 2007 11:50
To: Carina Brehony
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Chi Square with two tab-delimited text files

Carina Brehony napsal(a):
> Hi,
> I want to do a chi square test and I have two tab delimited text files
with
> Expected and Observed values to compare.  Each file contains only the
values
<snip>

There are a lot of chi^2 tests, most of them compare O&E quantities and 
it is not clear which one you want to use. I'd guess a goodness of fit 
test, but who knows? See ?chisq.test and the examples given there. It 
also tells you that the y-argument is ignored if x is a matrix (that's 
probably the reason why you get different results using read.table and 
scan).
Petr
-- 
Petr Klasterecky
Dept. of Probability and Statistics
Charles University in Prague
Czech Republic



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