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!Website – http://greenvillebig.org!

Facebook – www.facebook.com/greenvillebig!Twitter - @GreenvilleBIG!

Linkedin – Greenville BIG User Group!!

R with SQL Server Bill Fellows- Thursday, August 14, 2014 (6:00 PM - 8:30 PM)

ITT Technical Institute - 6 Independence Pointe, Greenville, SC, 29615!!

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• August 19 - GSP Developers Guild !

• August 20 - GSATC Technology Council !

• August 20 - Tech After Five !

• September 2 - SSIG Meeting !

• September 6 - SQL Saturday Raleigh !

• September 14 - SQL Saturday Kansas City !

• October 4 - SQL Saturday Charlotte !

• November 4-7 - PASS Summit - Seattle, WA $150 Discount Code: USSES33

!

Upcoming Events!

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Reeves Smith - Thursday, September 11, 2014 (6:00 PM - 8:30 PM)ITT Technical Institute - 6 Independence Pointe, Greenville, SC, 29615!!Understand how a Master Data Management (MDM) and Data Governance methodology can enable business clarity across the enterprise. Get introduced to Master Data Services (MDS) which is a Master Data Management solution on the Microsoft Platform. This solution enables the management of non-transactional data that defines a business entity within the enterprise. Get a good business and technical understanding of how MDS can help obtain better business clarity across the organization through a data governance strategy. Data governance is a methodology that represents quality, policies, and process management, in relation to handling your enterprise data. The demo will walk through the basics of getting started with Master Data Services 2012 including the Excel Add-in for Master Data Services.`!

Master Data Services, How Does It Apply to My Enterprise!

Getting started with R and SQL Server

An introduction to the R language

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Bill Fellows bill.fellows@gmail.com

http://blog.billfellows.net/ @billinkc #New2R

Who are you?

• Developer

• Business analyst

• Manager

• Lost

5"BouncingTownshend" by Jean-Luc - originally posted to Flickr as The WHO. Licensed under Creative Commons Attribution-Share Alike 2.0 via Wikimedia Commons - http://

commons.wikimedia.org/wiki/File:BouncingTownshend.jpg#mediaviewer/File:BouncingTownshend.jpg

Why should you stay?

• Money

• Able to install R/R Studio

• Set up ODBC connection

• Pull data from SQL Server

• Perform analysis

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"Stay Thirsty - 2011 Travers Stakes" by Mike L Photo's - Flickr: Stay Thirsty - 2011 Travers Stakes. Licensed under Creative Commons Attribution 2.0 via Wikimedia Commons - http://

commons.wikimedia.org/wiki/File:Stay_Thirsty_-_2011_Travers_Stakes.jpg#mediaviewer/File:Stay_Thirsty_-_2011_Travers_Stakes.jpg

Money: either spend less of the company’s by using open source tools or empower you to be more competitive

Agenda

• What is R

• How do I get it

• Show me the basics

• Work with my database

• Profit

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What is R8

http://upload.wikimedia.org/wikipedia/commons/f/fe/R_cursiva.gif

It’s a letter, Wikipedia says so

R Language

• Statistical programming Language

• Implementation of S

• Free

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http://upload.wikimedia.org/wikipedia/commons/c/c1/Rlogo.png

http://en.wikipedia.org/wiki/R_(programming_language) http://www.r-project.org/

Get it

• http://cran.rstudio.com/

• http://www.rstudio.com/products/rstudio/download/

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Help!

• ?

• help(topic)

• ?? or help.search(topic)

• example

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"Help" by The cover art of the Beatles' album Help!, taken from the Apple iTunes Store.. Licensed under Fair use of copyrighted material in the context of Help! (album) via

Wikipedia - http://en.wikipedia.org/wiki/File:Help.jpg#mediaviewer/File:Help.jpg

Launch R-Studio and start getting help vignette

Data Types

• numeric

• integer

• complex

• logical

• character

12http://www.trekmate.org.uk/wp-content/uploads/2014/05/Data_and_Lore_2364.jpg

http://www.r-tutor.com/r-introduction/basic-data-types numeric is default character can use “ or ‘ (underneath it’s all “) factor vs text also referred to as mode

Operations

• + - * / ^

• <- =

• == | > <

• c

• scan

13http://www.flickr.com/photos/pernell/3296502

addition, subtraction, multiplication, division, exponent assignment (old vs new style) equality, or, greater than, less than c - combine

what is is

• is.integer

• as.integer

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is tests whether something is derived from another as is an explicit cast

Free data

• data()

• demo()

15http://www.duncanchannon.com/wp-content/uploads/2009/02/free-candy-

van.jpg

Analyze this

• mean

• sd

• cor

• summary

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Show me the data

• plot

• qplot - quick plots

• ggplot - kitchen sink

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http://www.r-bloggers.com/basic-introduction-to-ggplot2/

Time to make the data

• c

• scan

• scan(file=‘’)

• read.csv

• NA

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"Glazed-Donut" by Evan-Amos - Own work. Licensed under Public domain via Wikimedia Commons - http://

commons.wikimedia.org/wiki/File:Glazed-Donut.jpg#mediaviewer/File:Glazed-Donut.jpg

scan(file.choose()) Demo scan pulling internet data read.csv(file, sep = ',', header = TRUE, row.names) read.delim read.table all purpose row = observation, rownames; columns = variables, factors

Data Types too

• vectors (1D)

• matrices (2D)

• arrays (nD)

• data frames

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Everything’s a vector Matrix - innards are all same type str() reveals all, class() more succinctly variables: nominal (no order {coffee, tea}), ordinal (order without magnitude {venti, tall, grande}), continuous (order & magnitude {20, ?, ?}) factors: categorical & ordinal;

Vector

• (ordinal1, ordinal2)

• [ordinal1:ordinal3]

• Negative slice removes element - contrary to python

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One based, ish scalar values are really just one element vectors

Connect to SQL Server

• FreeTDS (for mac weenies)

• install.packages(“RODBC”) or install.packages(“rsqlserver”)

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http://www.freetds.org/ http://blog.benjaminwalters.net/?p=10 http://www.r-bloggers.com/guide-to-accessing-ms-sql-server-and-mysql-server-on-mac-os-x/ http://stackoverflow.com/questions/24875169/trouble-connecting-tsql-to-sql-server https://github.com/agstudy/rsqlserver/wiki/benchmarking !

ODBC Interface

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Function Description

odbcConnect(dsn, uid="", pwd="") Open a connection to an ODBC database

sqlFetch(channel, sqtable) Read a table from an ODBC database into a data frame

sqlQuery(channel, query) Submit a query to an ODBC database and return the results

sqlSave(channel, mydf, tablename = sqtable, append = FALSE)

Write or update (append=True) a data frame to a table in the ODBC database

sqlDrop(channel, sqtable) Remove a table from the ODBC database

close(channel) Close the connection

http://www.statmethods.net/input/dbinterface.html

Resources• Beginning R: The Statistical Programming

Language

• R in Action: Data analysis and graphics with R

• http://swirlstats.com/students.html

• http://datascience101.wordpress.com/2014/07/07/statistical-programming-languages-infographic/

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Beginning R the statistical programming language by Gardener, Mark. ISBN 111816430X R in Action: Data analysis and graphics with R http://www.manning.com/kabacoff2/ ISBN 9781617291388

Resources• http://gettinggeneticsdone.blogspot.ca/2014/07/

introduction-to-r-for-life-scientists.html (cheat sheet)

• http://r-tutor.com/r-introduction/

• http://datacamp.com/

• http://www.r-bloggers.com/guide-to-accessing-ms-sql-server-and-mysql-server-on-mac-os-x/

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Resources• http://blog.sqltrainer.com/2011/12/statistical-

analysis-with-r-and.html

• http://http://www.johndcook.com/R_language_for_programmers.html

• http://google-styleguide.googlecode.com/svn/trunk/google-r-style.html

• http://cran.r-project.org/doc/manuals/R-data.pdf

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DOOR PRIZES