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Create ggplot2 geom(s) from a list

Source: R/geom_from_list.R
geom_from_list.Rd

These helper functions are built on top of ggplot2::layer() and can be used to add geom(s), whose type and content are specified as a list.

Usage

geom_from_list(x, ...)

geoms_from_list(x, ...)

Arguments

x

A list containing:

  • a geom type (e.g. geom = "point"),

  • a list of aesthetics (e.g. aes = list(x = "mpg", y = "wt")),

  • some data (e.g. data = mtcars),

  • and some other parameters.

For geoms_from_list() ("geoms" with an "s"), the input must be a list of lists, ideally named "l1", "l2", "l3", etc.

...

Additional arguments passed to ggplot2::layer().

Examples

library(ggplot2)

# Example 1 (basic geoms and labels) --------------------------
l1 <- list(
  geom = "point",
  data = mtcars,
  aes = list(x = "mpg", y = "wt", size = "hp", color = "hp"),
  show.legend = c("size" = FALSE)
)
l2 <- list(
  geom = "labs",
  title = "A Title"
)

ggplot() +
  geom_from_list(l1) +
  geom_from_list(l2)


ggplot() +
  geoms_from_list(list(l1 = l1, l2 = l2))


# Example 2 (Violin, boxplots, ...) --------------------------
l1 <- list(
  geom = "violin",
  data = iris,
  aes = list(x = "Species", y = "Sepal.Width")
)
l2 <- list(
  geom = "boxplot",
  data = iris,
  aes = list(x = "Species", y = "Sepal.Width"),
  outlier.shape = NA
)
l3 <- list(
  geom = "jitter",
  data = iris,
  width = 0.1,
  aes = list(x = "Species", y = "Sepal.Width")
)

ggplot() +
  geom_from_list(l1) +
  geom_from_list(l2) +
  geom_from_list(l3)


# Example 3 (2D density) --------------------------
ggplot() +
  geom_from_list(list(
    geom = "density_2d", data = iris,
    aes = list(x = "Sepal.Width", y = "Petal.Length")
  ))

ggplot() +
  geom_from_list(list(
    geom = "density_2d_filled", data = iris,
    aes = list(x = "Sepal.Width", y = "Petal.Length")
  ))

ggplot() +
  geom_from_list(list(
    geom = "density_2d_polygon", data = iris,
    aes = list(x = "Sepal.Width", y = "Petal.Length")
  ))

ggplot() +
  geom_from_list(list(
    geom = "density_2d_raster", data = iris,
    aes = list(x = "Sepal.Width", y = "Petal.Length")
  )) +
  scale_x_continuous(expand = c(0, 0)) +
  scale_y_continuous(expand = c(0, 0))


# Example 4 (facet and coord flip) --------------------------

ggplot(iris, aes(x = Sepal.Length, y = Petal.Width)) +
  geom_point() +
  geom_from_list(list(geom = "hline", yintercept = 2)) +
  geom_from_list(list(geom = "coord_flip")) +
  geom_from_list(list(geom = "facet_wrap", facets = "~ Species", scales = "free"))


# Example 5 (theme and scales) --------------------------
ggplot(iris, aes(x = Sepal.Length, y = Petal.Width, color = Species)) +
  geom_point() +
  geom_from_list(list(geom = "scale_color_viridis_d", option = "inferno")) +
  geom_from_list(list(geom = "theme", legend.position = "top"))


ggplot(iris, aes(x = Sepal.Length, y = Petal.Width, color = Species)) +
  geom_point() +
  geom_from_list(list(geom = "scale_color_material_d", palette = "rainbow")) +
  geom_from_list(list(geom = "theme_void"))


# Example 5 (Smooths and side densities) --------------------------

ggplot(iris, aes(x = Sepal.Length, y = Petal.Width)) +
  geom_from_list(list(geom = "point")) +
  geom_from_list(list(geom = "smooth", color = "red")) +
  geom_from_list(list(aes = list(x = "Sepal.Length"), geom = "ggside::geom_xsidedensity")) +
  geom_from_list(list(geom = "ggside::scale_xsidey_continuous", breaks = NULL))