R: Independence table

indTab {robCompositions} | R Documentation

## Independence table

### Description

Estimates the expected frequencies from an m-way table under the null hypotheses of independence.

### Usage

    indTab(x, margin = c("gmean_sum", "sum"), frequency = c("relative",
      "absolute"), pTabMethod = c("dirichlet", "half", "classical"))

### Arguments

`x` | an object of class table
`margin` | determines how the margins of the table should be estimated (default via geometric mean margins)
`frequency` | indicates whether absolute or relative frequencies should be computed.
`pTabMethod` | to estimate the propability table. Default is ‘dirichlet’. Other available methods: ‘classical’ that is function `prop.table()` from package base or method “half” that add 1/2 to each cell to avoid zero problems.

### Details

Because of the compositional nature of probability tables, the independence tables should be estimated using geometric marginals.

### Value

The independence table(s) with either relative or absolute frequencies.

### Author(s)

Matthias Templ

### References

Egozcue, J.J., Pawlowsky-Glahn, V., Templ, M., Hron, K. (2015) Independence in contingency tables using simplicial geometry. Communications in Statistics - Theory and Methods, 44 (18), 3978–3996.

### Examples

    data(precipitation)
    tab1 <- indTab(precipitation)
    tab1
    sum(tab1)

    ## Not run:
    data("PreSex", package = "vcd")
    indTab(PreSex)

    ## End(Not run)

[Package robCompositions version 2.1.0 Index]