R: Interaction table

intTab {robCompositions} | R Documentation

## Interaction table

### Description

Estimates the interaction table based on clr and inverse clr coefficients.

### Usage

    intTab(x, y, frequencies = c("relative", "absolute"))

### Arguments

`x` | an object of class table
`y` | the corresponding independence table which is of class “intTab”.
`frequencies` | indicates whether absolute or relative frequencies should be computed.

### Details

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

### Value

- intTabThe interaction table(s) with either relative or absolute frequencies.

- signsThe sign illustrates if there is an excess of probability (plus), or a deficit (minus) regarding to the estimated probability table and the independece table in the clr space.

### 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)
    tab1prob <- prop.table(precipitation)
    tab1 <- indTab(precipitation)
    intTab(tab1prob, tab1)

[Package robCompositions version 2.2.1 Index]