Identity ("no-op") transformation (Layer operation)

A layer operation which returns the input layer-like object unchanged.

Usage

nop(object)

Arguments

object

One of:

• A layer-like object: applies this operation to the layer.

• A missing argument: creates an operation

Value

A layer-like object (if object is layer-like) or an operation (if not).

Details

When numeric()s are used with operations, they are converted into sums of nop()s.

See also

operation for a description of layer operations.

Other layer operations: adjust, affine_transform, blend, copy, partition()

Examples

library(ggplot2)

# adding a nop to another operation is equivalent to adding a numeric
adjust() + nop()
#> <operation>: (adjust() + 1)

# and vice versa
adjust() + 2
#> <operation>: (adjust() + 1 + 1)

# here we use adjust() with nop() ( + 1) to create a copy of
# the stat_smooth layer, putting a white outline around it.
set.seed(1234)
k = 1000
data.frame(
  x = seq(1, 10, length.out = k),
  y = rnorm(k, seq(1, 2, length.out = k) + c(0, 0.5)),
  g = c("a", "b")
) |>
  ggplot(aes(x, y, color = g)) +
  geom_point() +
  stat_smooth(method = lm, formula = y ~ x, linewidth = 1.5, se = FALSE) *
    (adjust(aes(group = g), color = "white", linewidth = 4) + 1) +
  scale_color_brewer(palette = "Dark2")


# (note this could also be done with copy_under())