plo_inter: Plot of Interactions

In morepls: Interpretation Tools for Partial Least Squares Regression

Plot of Interactions

Description

Plots the interaction between two categorical supplementary variables for a PLS regression.

Usage

plo_inter(object, var1, var2, excl1 = NULL, excl2 = NULL,
  comps = c(1,2), shapesize = 1, textsize = 3,
  force = 1, max.overlaps = Inf,
  lines = TRUE, dashes = TRUE)

Arguments

object	an object of class mvr from pls package
var1	factor. The first categorical supplementary variable.
var2	factor. The second categorical supplementary variable.
excl1	character vector of categories from the var1 to exclude from the plot. If NULL (default), all the supplementary categories are plotted.
excl2	character vector of categories from the var2 to exclude from the plot. If NULL (default), all the supplementary categories are plotted.
comps	the components to use. Default is c(1,2).
shapesize	Size of the shapes. Default is 1.
textsize	Size of the labels of categories. Default is 3.
force	Force of repulsion between overlapping text labels. Defaults to 1. If 0, labels are not repelled at all.
max.overlaps	Exclude text labels that overlap too many things. Defaults to Inf, which means no labels are excluded.
lines	logical. Whether to add colored lines between the points of the categories of v1. Default is TRUE.
dashes	logical. Whether to add gray dashed lines between the points of the categories of v2. Default is TRUE.

Value

a ggplot2 object

Author(s)

Nicolas Robette

References

Martens, H., Næs, T. (1989) Multivariate calibration. Chichester: Wiley.

Tenenhaus, M. (1998) La Regression PLS. Theorie et Pratique. Editions TECHNIP, Paris.

See Also

plo_sup, plo_part

Examples

library(pls)
data(mpg, package = "ggplot2")
pls <- mvr(displ ~ cty + hwy + cyl,
           ncomp = 3,
           data = mpg,
           validation = "CV",
           method = "oscorespls")
supvars <- data.frame(class = factor(mpg$class), trans = factor(mpg$trans))
plo_inter(pls, factor(mpg$class), factor(mpg$trans), lines = FALSE, dashes = FALSE)

morepls documentation built on June 8, 2025, 10:34 a.m.