qwraps2 (version 0.4.2)

ggplot2_extract_legend: ggplot2 tools

Description

A few handy tools for working with ggplot2.

Usage

ggplot2_extract_legend(x)

Arguments

x

a ggplot

Value

a list with each element a ggplot

Details

The ggplot2_extract_legend function returns a list with the first element being the legend and the second the original plot with the legend omitted.

Examples

# NOT RUN {
# a simple plot
my_plot <- 
  ggplot2::ggplot(mtcars) + 
  ggplot2::aes(x = wt, y = mpg, color = wt, shape = factor(cyl)) + 
  ggplot2::geom_point()

my_plot

# extract the legend.  the return object is a list with two elements, the first
# element is the legend, the second is the original plot sans legend.
temp <- ggplot2_extract_legend(my_plot)

# view just the legend.  This can be done via a call to the object or using
# plot or print.
temp
plot(temp[[1]])

# the original plot without the legened
plot(temp[[2]])

# }