Request for plot_comparisons: choosing number of columns or rows when printing

[Crismoc]

When printing multiple plots with plot_*, is it possible to add a simple way to choose how many columns or rows the figure should have?

I imagine something like the code below, but making it possible to specify the rows or columns like this plot_comparisons(..., ncol = 1)

library(marginaleffects)
dat <- read.csv("https://vincentarelbundock.github.io/Rdatasets/csv/palmerpenguins/penguins.csv")

mod <- lm(body_mass_g ~ flipper_length_mm * species * bill_length_mm + island, data = dat)
plot_comparisons(mod,
                 variables = c("flipper_length_mm", "bill_length_mm"),
                 by = c("species", "island"))

[vincentarelbundock]

No, this is not possible. But these figures are absolutely trivial to draw once we have the proper dataset. And you can get the dataset by using draw=FALSE. After that, it should be no more than 3 lines of ggplot2 to get exactly what you want.

[Crismoc]

Thank you! You're right, it's possible to do it in one line relying on ggplot and finding the right name for the panels

library(ggplot2)
library(marginaleffects)
dat <- read.csv("https://vincentarelbundock.github.io/Rdatasets/csv/palmerpenguins/penguins.csv")

mod <- lm(body_mass_g ~ flipper_length_mm * species * bill_length_mm + island, data = dat)
plot_comparisons(mod,
                 variables = c("flipper_length_mm", "bill_length_mm"),
                 by = c("species", "island")) +
  facet_wrap(~term, ncol = 1)