Major Description
We should develop a SparkR style guide document based on the some of the guidelines we use and some of the best practices in R.
Some examples of R style guide are:
http://r-pkgs.had.co.nz/r.html#style
http://google-styleguide.googlecode.com/svn/trunk/google-r-style.html
A related issue is to work on a automatic style checking tool. https://github.com/jimhester/lintr seems promising
We could have a R style guide based on the one from google [1], and adjust some of them with the conversation in Spark:
1. Line Length: maximum 100 characters
2. no limit on function name (API should be similar as in other languages)
3. Allow S4 objects/methods