broman (version 0.38-2)

fisher: Fisher's exact test for a two-way table

Description

Performs a sampling version of Fisher's exact test for a two-way contingency table.

Usage

fisher(tab, n.sim=1000)

Arguments

tab

A matrix of counts.

n.sim

Number of samples of permuted tables to consider.

Value

• A single number: the P-value testing independence of rows and columns in the table.

Details

This is like the function fisher.test, but calculates an approximate P-value rather than performing a complete enumeration. This will be better for large, sparse tables.

References

Fisher, R. A. (1935). The logic of inductive inference. J. Roy. Stat. Soc. A 98, 39--54.

See Also

chisq.test, fisher.test, chisq

Examples

TeaTasting <- matrix(c(3,1,1,3),nrow=2)
fisher(TeaTasting,1000)