[R] How to solve empty cells in the contingency table?

David Duffy David.Duffy at qimr.edu.au
Fri Jun 27 06:53:29 CEST 2008

> Hi,Dear all R experts,
>    I am trying to do the 2-way contingency table analysis by fitting 
> the loglinear models. However, I found my table has several empty 
> cells which are theoretically missing values.I have no idea of how 
> to solve them coz we cannot compute the simulated p-value with zero 
> marginals.Does someone have some suggestions? Please help me out, 
> thanks a lot!
> Cheers,
> Yan

One approach: if they are *structural zeroes*,

tab <- as.data.frame(table(x,y))

then use the exactLoglinTest package's mcexact function

David Duffy.

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