GGtutorial: Day 5 – Gradient Colors and Brewer Palettes

November 2, 2012
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So, continuing with the short tutorials on how to do relatively simple (but sometimes very frustrating things) in ggplot, today’s post looks at how to use gradient colors and Brewer colors to color either continuous or discrete dependent variables. 

If you have a continuous dependent variable, you’ll want to use a gradient option that gently transitions between two specified colors. Some examples are below:

This is the output:

If you want to choose colors for factors or discrete variables, you might want to use a Brewer color scale (http://colorbrewer2.org/):

This is the output:

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