[R] test for contingency table when there are many zeros

2007-08-08 Thread gallon li
Here is my table

 tt
A   B
1 297 398
2 470 376
3  30  23
4   3   3
5   0   0

b/c two cells are zero, I can't use chisq.test() in R which gives the
following output;


 chisq.test(tt)

Pearson's Chi-squared test

data:  tt
X-squared = NaN, df = 4, p-value = NA

Warning message:
Chi-squared approximation may be incorrect in: chisq.test(tt)

What function should I use then? Any suggestion?

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Re: [R] test for contingency table when there are many zeros

2007-08-08 Thread Francisco J. Zagmutt
fisher.test(tt)

Francisco

gallon li wrote:
 Here is my table
 
 tt
 A   B
 1 297 398
 2 470 376
 3  30  23
 4   3   3
 5   0   0
 
 b/c two cells are zero, I can't use chisq.test() in R which gives the
 following output;
 
 
 chisq.test(tt)
 
 Pearson's Chi-squared test
 
 data:  tt
 X-squared = NaN, df = 4, p-value = NA
 
 Warning message:
 Chi-squared approximation may be incorrect in: chisq.test(tt)
 
 What function should I use then? Any suggestion?
 
   [[alternative HTML version deleted]]
 
 __
 R-help@stat.math.ethz.ch mailing list
 https://stat.ethz.ch/mailman/listinfo/r-help
 PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
 and provide commented, minimal, self-contained, reproducible code.


__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.