R help - Aug 2008 - how to use chisq.test with 2 row matrix having 0 in it?

Hi,
 
I am working on calculating X^2 for some matrix (most of them have either two
rows or 2 columns) by using chisq.test in R.  However when there are 0s in the
matrix, chisq.test does not work.  For example:
===================> elements <- matrix( c( 0, 0, 9, 5, 71, 168), nr = 2
)
> elements
     [,1] [,2] [,3]
[1,]    0    9   71
[2,]    0    5  168
> chisq.test( elements )
        Pearson's Chi-squared test
data:  elements 
X-squared = NaN, df = 2, p-value = NA
Warning message:
Chi-squared approximation may be incorrect in: chisq.test(elements) 
=================== 
Would anyone help me to figure out how to do it even there are 0s?  Thanks a
lot!!
 
Becky


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