cividis

Jamie R. Nuñez, Christopher R. Anderton, and Ryan S. Renslow recently introduced optimized color maps for the scientific community. This so-called "cividis" colormap is generated by optimizing the "viridis" colormap and is optimal for viewing by those with or without color vision deficiency (CVD), a different visual perception of colors that affects 8.5% of the human population. It is designed to be perfectly perceptually-uniform, both in regular form and also when converted to black-and-white, and can be perceived by readers with all forms of color blindness. The cividis colormap was developed as a Python module called "cmaputil".

Because of the high interest of the scientific community in R, we make this new colormap available for R!

This is how it looks like:

... and like this in action (coloring neutral landscape models from NLMR):

Installation

To install the developmental version of cividis, use the following R code:

# install.packages("devtools")
devtools::install_github("marcosci/cividis")

Example

This is a basic example which shows you how to solve a common problem:

## basic example code

# load packages
library(NLMR)
library(rasterVis)
library(cividis)

# simulate NLM
x <- nlm_random(ncol = 100,
                nrow = 100)

# plot it
gplot(x) +
 geom_tile(aes(fill = value)) +
 labs(x = "Easting",
      y = "Northing") +
 theme_nlm() +
 scale_fill_cividis(
    na.value = "transparent",
    name = "",
    guide = ggplot2::guide_colorbar(
      barheight = ggplot2::unit(40, units = "mm"),
      barwidth = ggplot2::unit(1, units = "mm"),
      draw.ulim = FALSE,
      title.hjust = 0.5,
      title.vjust = 1.5,
      label.hjust = 0.5
 )) -> p1
#> Scale for 'fill' is already present. Adding another scale for 'fill',
#> which will replace the existing scale.

Maintainer(s)

Marco Sciaini - [@msciain](https://twitter.com/msciain) - [email protected]

Author(s)

Marco Sciaini - [@msciain](https://twitter.com/msciain) - [email protected] Cédric Scherer - [@CedScherer](https://twitter.com/CedScherer) - [email protected]

References

The colormap in the cividis package was created and published by Jamie R. Nuñez and her colleagues.

The package is mainly a cheeky copy of the beautiful viridis package for R that was created by Simon Garnier, Noam Ross, and Bob Rudis.