R: Function to plot two interaction in a GAMLSS model

plot2way {gamlss} | R Documentation

## Function to plot two interaction in a GAMLSS model

### Description

This function is designed to plot a factor to factor interaction in a GAMLSS model.

### Usage

    plot2way(obj, terms = list(), what = c("mu", "sigma", "nu", "tau"),
            parameter= NULL, show.legend = TRUE, ...)

### Arguments

`obj` | A gamlss model
`terms` | this should be a character vector with the names of the two factors to be plotted
`what` | which parameters? `mu`, `sigma`, `nu`, or `tau`
`parameter` | equivalent to `what`
`show.legend` | whether to show the legend in the two way plot
`...` | Further arguments

### Details

This is an experimental function which should be use with prudence since no other check is done on whether this interaction interfere with other terms in the model

### Value

The function creates a 2 way interaction plot

### Author(s)

Mikis Stasinopoulos

### References

Rigby, R. A. and Stasinopoulos D. M. (2005). Generalized additive models for location, scale and shape,(with discussion), Appl. Statist., 54, part 3, pp 507-554.

Rigby, R. A., Stasinopoulos, D. M., Heller, G. Z., and De Bastiani, F. (2019) Distributions for modeling location, scale, and shape: Using GAMLSS in R, Chapman and Hall/CRC. An older version can be found in https://www.gamlss.com/.

Stasinopoulos D. M. Rigby R.A. (2007) Generalized additive models for location scale and shape (GAMLSS) in R. Journal of Statistical Software, Vol. 23, Issue 7, Dec 2007, https://www.jstatsoft.org/v23/i07/.

Stasinopoulos D. M., Rigby R.A., Heller G., Voudouris V., and De Bastiani F., (2017) Flexible Regression and Smoothing: Using GAMLSS in R, Chapman and Hall/CRC.

(see also https://www.gamlss.com/).

### See Also

`term.plot`,

### Examples

    data(aids)
    ti <- factor(c(rep(1,18),rep(2,27)))
    m1 <- gamlss(y~x+qrt*ti, data=aids, family=NBI)
    m2 <- gamlss(y~x+qrt*ti, data=aids, family=NO)
    plot2way(m1, c("qrt","ti"))
    plot2way(m1, c("ti", "qrt"))

[Package gamlss version 5.3-2 Index]