ggh4x (version 0.1.2)

ggsubset: Passing a subset of data to ggplot2 layers.

Description

This is a convenience function to allow layer objects, such as geoms, to take a subset of the data in the main ggplot() call, without storing a duplicate of the subset in the ggplot object.

Usage

ggsubset(rowtest = NULL, omit = NULL)

Arguments

rowtest

logical expression indicating which rows to keep.

omit

a character column name to exclude.

Value

A function that takes a data.frame as argument and returns a subset of that data.frame according to rowtest

Details

ggsubset is a wrapper around subset.data.frame where the subset argument is set to rowtest and the select argument to -omit. Since the data argument in the layer() function can take a function with one argument, we can pass the function returned from ggsubset as that argument to subset the data by rows.

See Also

See layer, specifically the data argument. See subset.data.frame for the internal function.

Examples

# NOT RUN {
ggplot(iris, aes(Sepal.Width, Sepal.Length)) +
  geom_point(data = ggsubset(Species == "setosa"))
# }