gg_pipe: Pipe ggplot object

In loon.ggplot: A Grammar of Interactive Graphics

Pipe ggplot object

Description

Pack a ggplot object forward to ggplot2loon expressions via a pipe-operator "%>%".

Usage

gg_pipe(data, ggObj)

Arguments

data	a data frame to use for ggplot
ggObj	a ggplot object to be passed though

Details

When "+" and "%>%" both appear in pipe operations, "%>%" takes the priority of "+",e.g:

mtcars %>% ggplot(aes(mpg, wt, colour = cyl)) + geom_point() %>% ggplot2loon(),

error would occur. The reason is

geom_point() %>% ggplot2loon()

would run before

ggplot(aes(mpg, wt, colour = cyl)) + geom_point().

Hence, we need a function gg_pipe() to pack the ggplot object and force operations happen in order.

Value

a ggplot evaluate object

Examples

if(requireNamespace("magrittr") && interactive()) {
## Not run: 
 # Error
 g <- mtcars %>%
    ggplot(aes(mpg, wt, colour = cyl)) +
    geom_point() %>%
    ggplot2loon()

## End(Not run)
 g <- mtcars %>%
   gg_pipe(
     ggplot(aes(mpg, wt, colour = cyl)) + geom_point()
   ) %>%
   ggplot2loon()
}

loon.ggplot documentation built on May 29, 2024, 4:58 a.m.