I have used the ggplot2 package for a while and really like this package. It's happy to see that Hadley Wickham has officially updated the ggplot2 to version 2.0.0. On the RStudio Blog, Hadley highlights several important changes:
- ggplot2 now has an official extension mechanism.
- There are a handful of new geoms, and updates to existing geoms.
- The default appearance has been thoroughly tweaked so most plots should look better.
- Facets have a much richer set of labelling options.
- The documentation has been overhauled to be more helpful, and require less integration across multiple pages.
- A number of older and less used features have been deprecated.
You can find the document/manua on the project website. Many times, I go to the dev website to find the latest document/vignettes (extension, aesthetic specifications, themes).
The R Graphics Cookbook by Winston Chang is a must-have book to learn and become an expert of ggplot2 user. You can find the codes here from the Cookbook-R, and the Google book here.
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