action_select_data: Select Data
In devOpifex/g2r: Interactive Grammar of Graphics

Select a dataset with an input_select().

1	action_select_data(g, input, datasets)

`g`	An object of class `g2r` or `g2Proxy` as returned by `g2()` or `g2_proxy()`.
`input`	Id of the `input_select()` used to choose the dataset.
`datasets`	A key value pair `list` where the `key` is the name of the dataset as listed in the `choices` of the `input_select()`.

# works in Rmarkdown
input_select(
  "selector",
  "Select a dataset",
  c("Cars", "More Cars")
)

cars1 <- cars
cars2 <- cars + c(1, -4)

g2(cars, asp(dist, speed)) %>%
  fig_point() %>%
  action_select_data(
    "selector",
    datasets = list(
      "Cars" = cars1,
      "More Cars" = cars2
    )
  )