Language:	en-GB
Title:	Multiple Fill and Colour Scales in 'ggplot2'
Version:	0.5.2
Description:	Use multiple fill and colour scales in 'ggplot2'.
License:	GPL-3
URL:	https://eliocamp.github.io/ggnewscale/, https://github.com/eliocamp/ggnewscale
BugReports:	https://github.com/eliocamp/ggnewscale/issues
Encoding:	UTF-8
Imports:	ggplot2 (≥ 3.5.0)
RoxygenNote:	7.3.2
Suggests:	testthat, vdiffr, covr
NeedsCompilation:	no
Packaged:	2025-06-20 03:50:42 UTC; elio
Author:	Elio Campitelli [cre, aut]
Maintainer:	Elio Campitelli <eliocampitelli@gmail.com>
Repository:	CRAN
Date/Publication:	2025-06-20 04:50:02 UTC

ggnewscale: Multiple Fill and Colour Scales in 'ggplot2'

Description

Use multiple fill and colour scales in 'ggplot2'.

Usage

To have more than one colour or fill scale in a plot using ggplot2, you add a new scale slot with new_scale and the following geoms will use a different scale than the previous ones.

Author(s)

Maintainer: Elio Campitelli eliocampitelli@gmail.com (ORCID)

See Also

Useful links:

• https://eliocamp.github.io/ggnewscale/

• https://github.com/eliocamp/ggnewscale

• Report bugs at https://github.com/eliocamp/ggnewscale/issues

Adds a new scale to a plot

Description

Creates a new scale "slot". Geoms added to a plot after this function will use a new scale definition.

Usage

new_scale(new_aes)

new_scale_fill()

new_scale_color()

new_scale_colour()

Arguments

Details

new_scale_color(), new_scale_colour() and new_scale_fill() are just aliases to new_scale("color"), etc...

Examples

library(ggplot2)

# Equivalent to melt(volcano), but we don't want to depend on reshape2
topography <- expand.grid(x = 1:nrow(volcano),
                          y = 1:ncol(volcano))
topography$z <- c(volcano)

# point measurements of something at a few locations
measurements <- data.frame(x = runif(30, 1, 80),
                           y = runif(30, 1, 60),
                           thing = rnorm(30))

ggplot(mapping = aes(x, y)) +
  geom_contour(data = topography, aes(z = z, color = stat(level))) +
  # Color scale for topography
  scale_color_viridis_c(option = "D") +
  # geoms below will use another color scale
  new_scale_color() +
  geom_point(data = measurements, size = 3, aes(color = thing)) +
  # Color scale applied to geoms added after new_scale_color()
  scale_color_viridis_c(option = "A")