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visreg and ggplot2

Source: vignettes/articles/gg.qmd

visreg plots are built with ggplot2. For example:

fit <- lm(Ozone ~ Solar.R + Wind + Temp, data = airquality)
visreg(fit, "Wind")

Graphical options regarding the appearance of points, lines, and bands are specified via the line, fill, and points arguments:

visreg(fit, "Wind",
  line = list(color = "red"),
  fill = list(fill = "green"),
  points = list(size = 2, shape = 1)
)

visreg returns a gg object, so you can use ggplot2 to add additional layers to the graph. For example, we could add a smoother:

visreg(fit, "Wind") + geom_smooth(method = "loess", col = "#FF4E37", fill = "#FF4E37")

Or we could modify the horizontal axis:

visreg(fit, "Wind") + scale_x_sqrt()