Update README.md

Add R language section

README.md

@@ -22,7 +22,15 @@
  - Transact-SQL ([T-SQL Reference])
  - Procedural Language/PostGres Structured Query Language ([PL/pgSQL Manual])
  - Python
- 
+
+## R Language
+ - [Google's R Style Guide]
+ - [Google's tweak guide]
+ - [Stackoverflow discussion]
+ - [Bioconductor’s coding standards]
+ - [Colin Gillespie’s R style guide]
+ - [Hadley Wickham’s style guide]
+
 [MSDN C#]:http://msdn.microsoft.com/en-us/library/xzf533w0%28v=vs.71%29.aspx
 [MSDN ASP.NET MVC]:http://msdn.microsoft.com/en-us/library/ms229042.aspx
 [Google's R Style Guide]:http://google-styleguide.googlecode.com/svn/trunk/Rguide.xml
@@ -43,3 +51,10 @@
 [R Language Definition]:http://cran.r-project.org/doc/manuals/R-lang.html
 [T-SQL Reference]:http://technet.microsoft.com/en-gb/library/ms189826%28v=sql.90%29.aspx
 [PL/pgSQL Manual]:http://www.postgresql.org/docs/9.3/static/plpgsql.html
+
+[Google's R Style Guide]:http://google-styleguide.googlecode.com/svn/trunk/Rguide.xml
+[Google's tweak guide]:http://r-pkgs.had.co.nz/style.html
+[Stackoverflow discussion]:http://stackoverflow.com/questions/10013545/are-there-any-official-naming-conventions-for-r
+[Bioconductor’s coding standards]:http://wiki.fhcrc.org/bioc/Coding_
+[Colin Gillespie’s R style guide]:http://csgillespie.wordpress.com/2010/11/23/r-style-guide/
+[Hadley Wickham’s style guide]:http://stat405.had.co.nz/r-style.html