plot2way: Function to plot two interaction in a GAMLSS model

Description Usage Arguments Details Value Author(s) References See Also Examples

View source: R/plot2way.R

Description

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

Usage

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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

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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"))

Example output

Loading required package: splines
Loading required package: gamlss.data
Loading required package: gamlss.dist
Loading required package: MASS
Loading required package: nlme
Loading required package: parallel
 **********   GAMLSS Version 5.0-2  ********** 
For more on GAMLSS look at http://www.gamlss.org/
Type gamlssNews() to see new features/changes/bug fixes.

GAMLSS-RS iteration 1: Global Deviance = 488.3831 
GAMLSS-RS iteration 2: Global Deviance = 488.2742 
GAMLSS-RS iteration 3: Global Deviance = 488.2741 
GAMLSS-RS iteration 1: Global Deviance = 424.2567 
GAMLSS-RS iteration 2: Global Deviance = 424.2567 

gamlss documentation built on March 31, 2021, 5:10 p.m.