Interaction Plot of Two Factors — plot

Line chart of the means of every combination of two factors, with the first factor on the x-axis and one line per level of the second factor. Works with anova_factorial, anova_spd and the other split-plot functions (first two factors, or the two named in factors), anova_strip and anova_repeated (time course).

Usage

plot_interaction(x, factors = NULL, title = NULL, ylab = NULL)

Arguments

x: A result object.
factors: Optional character vector of two factor names (split-plot results with more than two factors).
title: Plot title.
ylab: Y-axis label.

Value

A ggplot2 object.

Examples

if (requireNamespace("ggplot2", quietly = TRUE)) {
  data(clusterbean_spd)
  res <- anova_spd(clusterbean_spd, "seed_yield", "irrigation",
                   "nitrogen", "rep", verbose = FALSE)
  plot_interaction(res, ylab = "Seed yield (kg/ha)")
}