Color Tools

June 1, 2012
By

(This article was first published on jfisher-usgs, and kindly contributed to R-bloggers)

Colors are mysterious business and choosing the right color or color palette for an R graphics can sometimes be a chore. To alleviate this burden, I present two functions for choosing color values.

To access these functions install the RSurvey and dichromat packages:

install.packages(c("RSurvey", "dichromat"))
library(RSurvey)

Choose Color

The first function, ChooseColor (source), calls upon a graphical user interface (GUI) for choosing a color in the HSV color space (fig. 1).

col <- ChooseColor(col = "#669933")

center

Figure 1: A screenshot of the HSV color tool.

Choose Color Palette

The second function, ChoosePalette (source), calls upon a GUI for choosing a color palette in the HCL (Hue, Chroma, and Luminance) color space (fig. 2).

pal <- ChoosePalette(terrain_hcl)

center

Figure 2: A screenshot of the HCL color palette tool.

An example graphic accompanies the GUI and may be used to evaluate the robustness of individual color schemes (fig. 3).

center

Figure 3: Example graphic based on selected color palette.

The ChoosePalette function may eventually reside in the colorspace package.

To leave a comment for the author, please follow the link and comment on his blog: jfisher-usgs.

R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...



If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.