{"id":8199,"date":"2018-11-18T10:45:59","date_gmt":"2018-11-18T08:45:59","guid":{"rendered":"https:\/\/www.datanovia.com\/en\/?p=8199"},"modified":"2019-12-25T11:17:36","modified_gmt":"2019-12-25T09:17:36","slug":"the-a-z-of-rcolorbrewer-palette","status":"publish","type":"post","link":"https:\/\/www.datanovia.com\/en\/blog\/the-a-z-of-rcolorbrewer-palette\/","title":{"rendered":"The A &#8211; Z Of Rcolorbrewer Palette"},"content":{"rendered":"<p>&nbsp;<\/p>\n<div id=\"rdoc\">\n<p><strong>RColorBrewer<\/strong> is an R package that contains a ready-to-use color palettes for creating beautiful graphics.<\/p>\n<p>This article presents the different color palettes available in the RColorBrewer package. You will also learn how to use these palettes in <em>ggplot2<\/em> and in R base plots.<\/p>\n<p>Contents:<\/p>\n<div id=\"TOC\">\n<ul>\n<li><a href=\"#install-and-load-rcolorbrewer-package\">Install and load RcolorBrewer package<\/a><\/li>\n<li><a href=\"#display-all-brewer-palettes\">Display all brewer palettes<\/a><\/li>\n<li><a href=\"#show-only-colorblind-friendly-brewer-palettes\">Show only colorblind-friendly brewer palettes<\/a><\/li>\n<li><a href=\"#visualize-a-specific-brewer-palette\">Visualize a specific brewer palette<\/a><\/li>\n<li><a href=\"#using-rcolorbrewer-palettes-in-ggplot2\">Using RColorBrewer palettes in ggplot2<\/a>\n<ul>\n<li><a href=\"#create-a-basic-ggplot-colored-by-groups\">Create a basic ggplot colored by groups<\/a><\/li>\n<li><a href=\"#change-ggplot-group-colors-using-r-color-brewer-palettes\">Change ggplot group colors using r color brewer palettes<\/a><\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#using-rcolorbrewer-palettes-in-base-plots\">Using RColorBrewer palettes in base plots<\/a><\/li>\n<li><a href=\"#conclusion\">Conclusion<\/a><\/li>\n<\/ul>\n<\/div>\n<div id=\"install-and-load-rcolorbrewer-package\" class=\"section level2\">\n<h2>Install and load RcolorBrewer package<\/h2>\n<p>To install the package, type the following R code in the console:<\/p>\n<pre class=\"r\"><code>install.packages(\"RColorBrewer\")<\/code><\/pre>\n<p>Load the package as follow:<\/p>\n<pre class=\"r\"><code>library(RColorBrewer)<\/code><\/pre>\n<\/div>\n<div id=\"display-all-brewer-palettes\" class=\"section level2\">\n<h2>Display all brewer palettes<\/h2>\n<p>To display all the color palettes in the package, type this:<\/p>\n<pre class=\"r\"><code>display.brewer.all()<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-rcolorbrewer-palettes-1.png\" width=\"384\" \/><\/p>\n<p>The package contains 3 types of color palettes: sequential, diverging, and qualitative.<\/p>\n<div class=\"block\">\n<ol style=\"list-style-type: decimal;\">\n<li><strong>Sequential palettes<\/strong> (first list of colors), which are suited to ordered data that progress from low to high (gradient). The palettes names are : Blues, BuGn, BuPu, GnBu, Greens, Greys, Oranges, OrRd, PuBu, PuBuGn, PuRd, Purples, RdPu, Reds, YlGn, YlGnBu YlOrBr, YlOrRd.<\/li>\n<li><strong>Qualitative palettes<\/strong> (second list of colors), which are best suited to represent nominal or categorical data. They not imply magnitude differences between groups. The palettes names are : Accent, Dark2, Paired, Pastel1, Pastel2, Set1, Set2, Set3.<\/li>\n<li><strong>Diverging palettes<\/strong> (third list of colors), which put equal emphasis on mid-range critical values and extremes at both ends of the data range. The diverging palettes are : BrBG, PiYG, PRGn, PuOr, RdBu, RdGy, RdYlBu, RdYlGn, Spectral<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div id=\"show-only-colorblind-friendly-brewer-palettes\" class=\"section level2\">\n<h2>Show only colorblind-friendly brewer palettes<\/h2>\n<p>To display only colorblind-friendly brewer palettes, specify the option <code>colorblindFriendly = TRUE<\/code> as follow:<\/p>\n<pre class=\"r\"><code>display.brewer.all(colorblindFriendly = TRUE)<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-rcolorbrewer-palettes-colorblind-friendly-1.png\" width=\"384\" \/><\/p>\n<\/div>\n<div id=\"visualize-a-specific-brewer-palette\" class=\"section level2\">\n<h2>Visualize a specific brewer palette<\/h2>\n<p>To show a specific R color brewer palette, you can use the functions below:<\/p>\n<pre class=\"r\"><code># 1. Visualize a single RColorBrewer palette \r\n# by specifying its name\r\ndisplay.brewer.pal(n, name)\r\n\r\n# 2. Return the hexadecimal color code of the palette\r\nbrewer.pal(n, name)<\/code><\/pre>\n<p>Description of the function arguments:<\/p>\n<ul>\n<li><code>n<\/code>: Number of different colors in the palette, minimum 3, maximum depending on palette.<\/li>\n<li><code>name<\/code>: A palette name from the lists above. For example <code>name = RdBu<\/code>.<\/li>\n<\/ul>\n<p>The following R code demonstrates how to display one single r color brewer palette.<\/p>\n<pre class=\"r\"><code># View a single RColorBrewer palette by specifying its name\r\ndisplay.brewer.pal(n = 8, name = 'Dark2')<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-display-r-color-brewer-single-palette-1.png\" width=\"384\" \/><\/p>\n<pre class=\"r\"><code># Hexadecimal color specification \r\nbrewer.pal(n = 8, name = \"Dark2\")<\/code><\/pre>\n<pre><code>## [1] \"#1B9E77\" \"#D95F02\" \"#7570B3\" \"#E7298A\" \"#66A61E\" \"#E6AB02\" \"#A6761D\"\r\n## [8] \"#666666\"<\/code><\/pre>\n<\/div>\n<div id=\"using-rcolorbrewer-palettes-in-ggplot2\" class=\"section level2\">\n<h2>Using RColorBrewer palettes in ggplot2<\/h2>\n<div id=\"create-a-basic-ggplot-colored-by-groups\" class=\"section level3\">\n<h3>Create a basic ggplot colored by groups<\/h3>\n<p>We start by creating basic ggplots using the <code>iris<\/code> demo dataset. We\u2019ll create two differents of plots colored by groups: a scatter plot and a box plot.<\/p>\n<pre class=\"r\"><code>library(\"ggplot2\")\r\n# Box plot: changing the fill color by Species\r\nbp &lt;- ggplot(iris, aes(Species, Sepal.Length)) + \r\n  geom_boxplot(aes(fill = Species)) +\r\n  theme_minimal() +\r\n  theme(legend.position = \"top\")\r\nbp\r\n\r\n# Scatter plot: changing points color by Species\r\nsp &lt;- ggplot(iris, aes(Sepal.Length, Sepal.Width)) + \r\n  geom_point(aes(color = Species)) +\r\n  theme_minimal()+\r\n  theme(legend.position = \"top\")\r\nsp<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-ggplot-default-colors-1.png\" width=\"336\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-ggplot-default-colors-2.png\" width=\"336\" \/><\/p>\n<\/div>\n<div id=\"change-ggplot-group-colors-using-r-color-brewer-palettes\" class=\"section level3\">\n<h3>Change ggplot group colors using r color brewer palettes<\/h3>\n<p>Two color scale functions are available in ggplot2 for using the rcolorbrewer palettes:<\/p>\n<ul>\n<li><code>scale_fill_brewer()<\/code> for box plot, bar plot, violin plot, dot plot, etc<\/li>\n<li><code>scale_color_brewer()<\/code> for lines and points<\/li>\n<\/ul>\n<pre class=\"r\"><code># Box plot\r\nbp + scale_fill_brewer(palette = \"Dark2\")\r\n\r\n# Scatter plot\r\nsp + scale_color_brewer(palette = \"Dark2\")<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-rcolorbrewer-ggplot2-1.png\" width=\"336\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-rcolorbrewer-ggplot2-2.png\" width=\"336\" \/><\/p>\n<\/div>\n<\/div>\n<div id=\"using-rcolorbrewer-palettes-in-base-plots\" class=\"section level2\">\n<h2>Using RColorBrewer palettes in base plots<\/h2>\n<p>The function <code>brewer.pal()<\/code> is used to generate a vector of colors.<\/p>\n<pre class=\"r\"><code># Barplot using RColorBrewer\r\nbarplot(c(2,5,7), col = brewer.pal(n = 3, name = \"RdBu\"))<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/0101-rcolorbrewer-palette-using-rcolorbrewer-palette-in-base-plot-1.png\" width=\"134.4\" \/><\/p>\n<\/div>\n<div id=\"conclusion\" class=\"section level2\">\n<h2>Conclusion<\/h2>\n<p>In this article, we describe the different color palettes available in the RColorBrewer packages. We also provide examples of R codes for changing the color of plots created by either the ggplot2 R package or the R base graphic functions.<\/p>\n<\/div>\n<\/div>\n<p><!--end rdoc--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; RColorBrewer is an R package that contains a ready-to-use color palettes for creating beautiful graphics. This article presents the different color palettes available in the RColorBrewer package. You will [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7866,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rating_form_position":"","rating_results_position":"","mr_structured_data_type":"","footnotes":""},"categories":[126],"tags":[125],"class_list":["post-8199","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-r-tips-and-tricks","tag-r-colors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The A - Z Of Rcolorbrewer Palette You Must Know- Datanovia<\/title>\n<meta name=\"description\" content=\"This article presents the color palettes available in the RColorBrewer package. 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