Book Image

R Graph Essentials

Book Image

R Graph Essentials

Overview of this book

Table of Contents (11 chapters)
R Graph Essentials
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating attractive color schemes


You saw how to use scale_color_brewer to create various color schemes, starting with a range of blues (the default color scheme). While using this function, you must select the palette you wish to use. The scale_color_brewer() function uses syntax like this:

scale_color_brewer(..., type =  , palette = )

You can select either seq (sequential), div (diverging), or qual (qualitative). Within those options, you can then select a particular palette, where the available palettes control color schemes. Further information on scale_color_brewer() can be found at http://docs.ggplot2.org/current/scale_brewer.html.

Try all of the following lines of syntax yourself:

 P + geom_point(aes(color = factor(ETH)), size=I(4)) + scale_color_brewer(type="div") 

 P + geom_point(aes(color = factor(ETH)), size=I(4)) + scale_color_brewer(palette="Greens") 

 P + geom_point(aes(color = factor(ETH)), size=I(4)) + scale_color_brewer(type="seq", palette=3) 

 P + geom_point(aes(color...