Software

R for windows - http://cran.cnr.berkeley.edu/
IDE - http://rstudio.org/

Use case

R and BIEE

R plugins to Oracle (Oracle R Enterprise  packages)
Oracle - sys.rqScriptCreate, rqRowEval (parallelism applicable to rq.groupEval and rq.rowEval)
BI publisher consumes XML output from sys.rqScriptCreate for graphs
BIP and OBIEE can also execute R scripts and sys.rqScriptCreate

R and Hadoop

Hadoop - “Technically, Hadoop consists of two key services: reliable data storage using the Hadoop Distributed File  System (HDFS) 
                and high-performance parallel data processing using a technique called MapReduce.”
with R and Hadoop, you can pretty much do everything in R interface

R built-in statistical functions in Oracle

• these are the functions that I used for building the r2project - a regression analysis tool for Oracle workload performance
• these built-in functions are not smart scan offloadable

SQL> r
  1  select name , OFFLOADABLE from v$sqlfn_metadata
  2* where lower(name) like '%reg%'

NAME                           OFF
------------------------------ ---
REGR_SLOPE                     NO
REGR_INTERCEPT                 NO
REGR_COUNT                     NO
REGR_R2                        NO
REGR_AVGX                      NO
REGR_AVGY                      NO
REGR_SXX                       NO
REGR_SYY                       NO
REGR_SXY                       NO
REGEXP_SUBSTR                  YES
REGEXP_INSTR                   YES
REGEXP_REPLACE                 YES
REGEXP_COUNT                   YES

13 rows selected.

R Enterprise packages

• the sys.rqScriptCreate could be part of the Oracle R Enterprise packages that make use of SELECT SQLs and PARALLEL options (on hints/objects) & that's how it utilizes the Exadata offloading

SQL> select name , OFFLOADABLE from v$sqlfn_metadata
  2  where lower(name) like '%rq%';

no rows selected

References

http://www.oracle.com/technetwork/database/options/advanced-analytics/r-enterprise/index.html
http://blogs.oracle.com/R

Oracle By Example: Oracle R Enterprise Tutorial Series http://goo.gl/IKd6Q

Oracle R Enterprise Training 1 - Getting Started - http://goo.gl/krOrH
Oracle R Enterprise Training 2 - Introduction to R - http://goo.gl/EGEbn
Oracle R Enterprise Training 3 - Transparency Layer - http://goo.gl/vjvu7
Oracle R Enterprise Training 4 - Embedded R Scripts - http://goo.gl/aZXui
Oracle R Enterprise Training 5 - Operationalizing R Scripts - http://goo.gl/JNRFf
Oracle R Enterprise Training 6 - Advanced Topics - http://goo.gl/ziNs1

How to Import Data from External Files in R http://answers.oreilly.com/topic/1629-how-to-import-data-from-external-files-in-r/

Oracle R install http://husnusensoy.wordpress.com/2012/10/25/oracle-r-enterprise-configuration-on-oracle-linux/
Using the R Language with an Oracle Database. http://dbastreet.com/blog/?p=913

Shiny web app http://www.r-bloggers.com/introducing-shiny-easy-web-applications-in-r/

Plotting AWR database metrics using R http://dbastreet.com/blog/?p=946

Coursera 4 week course http://www.r-bloggers.com/videos-from-courseras-four-week-course-in-r/

Andy Klock's R reference https://www.evernote.com/shard/s242/sh/26a0913e-cead-4574-a253-aaf6c733bdbe/563543114559066dcb8141708c5c89a2