Tuesday, May 3, 2016

Oracle Data Visualisation Desktop : Enabling Advanced Analytics (R)

Oracle Data Visualization comes with all the typical features you have with Visual Analyzer that is part of BICS, DVCS and OBIEE.

An additional install you may want to do is to install the R language for Oracle Data Visualization Desktop. This is required to enable the Advanced Analytics feature of the tool.

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After installing Data Visualisation Desktop when you open the Advanced Analytics section and try to add one of the Advanced Analytics graphing option you will get an errors message as, shown below.

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In Windows, click on the Start button, then go to Programs and then Oracle. In there you will see a menu item called install Advanced Analytics i.e. install Oracle R Distribution on your machine.

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When you click on this menu option a new command line window will open and will proceed with the installation of Oracle R Distribution (in this case version 3.1.1, which is not the current version of Oracle R Distribution).

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By accepting the defaults and clicking next, Oracle R Distribution will be installed. The following images will step you through the installation.

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The final part of the installation is download and install lots and lots of supporting R packages.

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When these supporting R packages have been installed, you can now use the Advanced Analytics features of Oracle Data Visualisation Desktop.

If you had the tool open during this installation you will need to close/shutdown the tool and restart it.

Saturday, April 30, 2016

Oracle Data Visualisation : Setting up a Connection to your DB

Using Oracle Data Visualisation is just the same or very similar as to using the Cloud version of the tool.

In this blog post I will walk you through the steps you need to perform the first time you use the Oracle Data Visualization client tool and to quickly create some visualizations.

Step 1 - Create a Connection to your Oracle DB and Schema

After opening Oracle Data Visualisation client tool client on the Data Sources icon that is displayed along the top of the screen.

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Then click on the 'Connection' button. You need to create a connection to your schema in the Oracle Database. Other options exist to create a connection to files etc. But for this example click on 'From Database.

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Enter you connections details for your schema in your Oracle Database. This is exactly the same kind of information that you would enter for creating a SQL Developer connection. Then click the Save button.

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Step 2 - Defining the data source for your analytics

You need to select the tables or views that you are going to use to build up your data visualizations. In the Data Sources section of the tool (see the first image above) click on the 'Create Data New Data Source' button and then select 'From Database'. The following window (or one like it) will be displayed. This will contain all the schemas in the DB that you have some privileges for. You may just see your schema or others.

Select your schema from the list. The window will be updated to display the tables and views in the schema. You can change the layout from icon based to being a list. You can also define a query that contains the data you want to analyse using the SQL tab.

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When you have select the table or view to use or have defined the SQL for the data set, a window will be displayed showing you a sample of the data. You can use this window to quickly perform a visual inspection of the data to make sure it is the data you want to use.

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The data source you have defined will now be listed data sources part of the tool. You can click on the option icon (3 vertical dots) on the right hand side of the data source and then select Create VA Project from the pop up menu.

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Step 3 - Create your Oracle Data Visualization project

When the Visual Analyser part of the tool opens, you can click and drag the columns from your data set on to the workspace. The data will be automatically formatted and displayed on the screen. You can also quickly generate lots of graphics and again click and drag the columns on the graphics to define various element.

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Oracle Data Visualization Desktop - now available

After a bit of a long wait Oracle have finally release Oracle Data Visualization for the desktop. The desktop version of this tool is only available for Windows desktops at the moment. I'm sure Oracle will be bringing out versions of other OS soon (I hope).

To get you hands on the Oracle Data Visualization to to the following OTN webpage (click on this image)

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After downloading has finished, you can run the installer.

When the Oracle Installer opens you will be prompted to enter the required details or to accept the defaults, as outlined below.

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  • Installation Location : Decide where you are going to have the Oracle Data Visualization tool installed on your desktop. The default location is C:\Program Files\Oracle Data Visualization Desktop . Click Next
  • Options : There are 2 check boxes for 'Create desktop shortcut' and 'Deploy samples'. Leave both of these checked, as you will probably want these. Click Next.
  • Summary : Lists a summary of the installation. There is nothing really for you to do here, so on the Install button.
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  • Progress : You can ten sit back and monitor the progress of the installation. The installation tool about 4 minutes on my small Windows VM
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When the installation is complete you can now fire up Oracle Data Visualization and enjoy. If you have just installed the tool it will automatically be started for you.

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When the tool has finished all the configurations that it needs to do, the tool will open with the following window and shows a sample projects for you to get an idea of some of the things that are possible.

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For more details on the tool and on the Oracle Cloud hosted version click on the following image to get to the Oracle webpage for the product.

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Friday, April 29, 2016

Accessing the R datasets in ORE and SQL

When you install R you also get a set of pre-compiled datasets. These are great for trying out many of the features that are available with R and all the new packages that are being produced on an almost daily basis.

The exact list of data sets available will depend on the version of R that you are using.

To get the list of available data sets in R you can run the following.

> library(help="datasets")

This command will list all the data sets that you can reference and start using immediately.

I'm currently running the latest version of Oracle R Distribution version 3.2. See the listing at the end of this blog post for the available data sets.

But are these data sets available to you if you are using Oracle R Enterprise (ORE)? The answer is Yes of course they are.

But are these accessible on the Oracle Database server? Yes they are, as you have R installed there and you can use ORE to access and use the data sets.

But how? how can I list what is on the Oracle Database server using R? Simple use the following ORE code to run an embedded R execution function using the ORE R API.

What? What does that mean? Using the R on your client machine, you can use ORE to send some R code to the Oracle Database server. The R code will be run on the Oracle Database server and the results will be returned to the client. The results contain the results from the server. Try the following code.

ore.doEval(function() library(help="datasets")) 

# let us create a functions for this code
myFn <- function() {library(help="datasets")}

# Now send this function to the DB server and run it there.
ore.doEval(myFn)

# create an R script in the Oracle Database that contains our R code
ore.scriptDrop("inDB_R_DemoData")
ore.scriptCreate("inDB_R_DemoData", myFn)
# Now run the R script, stored in the Oracle Database, on the Database server
#   and return the results to my client
ore.doEval(FUN.NAME="inDB_R_DemoData")

Simple, Right!

Yes it is. You have shown us how to do this in R using the ORE package. But what if I'm a SQL developer. Can I do this in SQL? Yes you can. Connect you your schema using SQL Developer/SQL*Plus/SQLcl or whatever tool you will be using to run SQL. Then run the following SQL.

select * 
from table(rqEval(null, 'XML', 'inDB_R_DemoData'));

This SQL code will return the results in XML format. You can parse this to extract and display the results and when you do you will get something like the following listing, which is exactly the same that is produced when you run the R code that I gave above.

So what this means is that evening if you have an empty schema with no data in it, and as long as you have the privileges to run embedded R execution, you actually have access to all these different data sets. You can use these to try our R using the ORE SQL APIs too.

		Information on package ‘datasets’

Description:

Package:       datasets
Version:       3.2.0
Priority:      base
Title:         The R Datasets Package
Author:        R Core Team and contributors worldwide
Maintainer:    R Core Team 
Description:   Base R datasets.
License:       Part of R 3.2.0
Built:         R 3.2.0; ; 2015-08-07 02:20:26 UTC; windows

Index:

AirPassengers           Monthly Airline Passenger Numbers 1949-1960
BJsales                 Sales Data with Leading Indicator
BOD                     Biochemical Oxygen Demand
CO2                     Carbon Dioxide Uptake in Grass Plants
ChickWeight             Weight versus age of chicks on different diets
DNase                   Elisa assay of DNase
EuStockMarkets          Daily Closing Prices of Major European Stock
                        Indices, 1991-1998
Formaldehyde            Determination of Formaldehyde
HairEyeColor            Hair and Eye Color of Statistics Students
Harman23.cor            Harman Example 2.3
Harman74.cor            Harman Example 7.4
Indometh                Pharmacokinetics of Indomethacin
InsectSprays            Effectiveness of Insect Sprays
JohnsonJohnson          Quarterly Earnings per Johnson & Johnson Share
LakeHuron               Level of Lake Huron 1875-1972
LifeCycleSavings        Intercountry Life-Cycle Savings Data
Loblolly                Growth of Loblolly pine trees
Nile                    Flow of the River Nile
Orange                  Growth of Orange Trees
OrchardSprays           Potency of Orchard Sprays
PlantGrowth             Results from an Experiment on Plant Growth
Puromycin               Reaction Velocity of an Enzymatic Reaction
Theoph                  Pharmacokinetics of Theophylline
Titanic                 Survival of passengers on the Titanic
ToothGrowth             The Effect of Vitamin C on Tooth Growth in
                        Guinea Pigs
UCBAdmissions           Student Admissions at UC Berkeley
UKDriverDeaths          Road Casualties in Great Britain 1969-84
UKLungDeaths            Monthly Deaths from Lung Diseases in the UK
UKgas                   UK Quarterly Gas Consumption
USAccDeaths             Accidental Deaths in the US 1973-1978
USArrests               Violent Crime Rates by US State
USJudgeRatings          Lawyers' Ratings of State Judges in the US
                        Superior Court
USPersonalExpenditure   Personal Expenditure Data
VADeaths                Death Rates in Virginia (1940)
WWWusage                Internet Usage per Minute
WorldPhones             The World's Telephones
ability.cov             Ability and Intelligence Tests
airmiles                Passenger Miles on Commercial US Airlines,
                        1937-1960
airquality              New York Air Quality Measurements
anscombe                Anscombe's Quartet of 'Identical' Simple Linear
                        Regressions
attenu                  The Joyner-Boore Attenuation Data
attitude                The Chatterjee-Price Attitude Data
austres                 Quarterly Time Series of the Number of
                        Australian Residents
beavers                 Body Temperature Series of Two Beavers
cars                    Speed and Stopping Distances of Cars
chickwts                Chicken Weights by Feed Type
co2                     Mauna Loa Atmospheric CO2 Concentration
crimtab                 Student's 3000 Criminals Data
datasets-package        The R Datasets Package
discoveries             Yearly Numbers of Important Discoveries
esoph                   Smoking, Alcohol and (O)esophageal Cancer
euro                    Conversion Rates of Euro Currencies
eurodist                Distances Between European Cities and Between
                        US Cities
faithful                Old Faithful Geyser Data
freeny                  Freeny's Revenue Data
infert                  Infertility after Spontaneous and Induced
                        Abortion
iris                    Edgar Anderson's Iris Data
islands                 Areas of the World's Major Landmasses
lh                      Luteinizing Hormone in Blood Samples
longley                 Longley's Economic Regression Data
lynx                    Annual Canadian Lynx trappings 1821-1934
morley                  Michelson Speed of Light Data
mtcars                  Motor Trend Car Road Tests
nhtemp                  Average Yearly Temperatures in New Haven
nottem                  Average Monthly Temperatures at Nottingham,
                        1920-1939
npk                     Classical N, P, K Factorial Experiment
occupationalStatus      Occupational Status of Fathers and their Sons
precip                  Annual Precipitation in US Cities
presidents              Quarterly Approval Ratings of US Presidents
pressure                Vapor Pressure of Mercury as a Function of
                        Temperature
quakes                  Locations of Earthquakes off Fiji
randu                   Random Numbers from Congruential Generator
                        RANDU
rivers                  Lengths of Major North American Rivers
rock                    Measurements on Petroleum Rock Samples
sleep                   Student's Sleep Data
stackloss               Brownlee's Stack Loss Plant Data
state                   US State Facts and Figures
sunspot.month           Monthly Sunspot Data, from 1749 to "Present"
sunspot.year            Yearly Sunspot Data, 1700-1988
sunspots                Monthly Sunspot Numbers, 1749-1983
swiss                   Swiss Fertility and Socioeconomic Indicators
                        (1888) Data
treering                Yearly Treering Data, -6000-1979
trees                   Girth, Height and Volume for Black Cherry Trees
uspop                   Populations Recorded by the US Census
volcano                 Topographic Information on Auckland's Maunga
                        Whau Volcano
warpbreaks              The Number of Breaks in Yarn during Weaving
women                   Average Heights and Weights for American Women

Thursday, April 28, 2016

DAMA Ireland: Data Protection Event 5th May

We have our next DAMA Ireland event/meeting coming up on the 5th May, and will be in our usual venue of Bank of Ireland, 1 Grand Canal Dock.

Our meeting will cover two topics. The main topic for the evening will be on Data Protection. We have Daragh O'Brien (MD of Castlebridge Associate) presenting on this. Daragh is also the Global Data Privacy Officer for DAMA International. He has also been invoked in contributing to the next version of the DMBOK, that is coming out very soon.

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We also have Katherine O'Keefe who will be talking the DAMA Certified Data Management Practitioners (CDMP) certification. Katherine has been working with DAMA International on updates to the new CDMP certification.

To check out more details of the event/meeting, click on the Eventbrite image below. This will take you to the event/meeting details and where you can also register for the meeting.

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Cost : FREE

When : 5th May

Where : Bank of Ireland, 1 Grand Canal Dock

PS: Please register in advance of the meeting, as we would like to know who and how many are coming, to allow us to make any necessary arrangements.

Tuesday, April 12, 2016

Oracle Advanced Analytics on Oracle Cloud

You have heard about the cloud? Right? Even the Oracle Cloud?

If you haven't, then maybe we need to look at how you can learn more about the Oracle Cloud.

Over the past while, and in the past few weeks in particular, Oracle has been advertising about how you can get a trail Oracle cloud service setup for FREE. Well it is free for one month when you set it up on the Oracle website (cloud.oracle.com).

As I like to talk about and use the Oracle Advanced Analytics (OAA) option (a lot), I thought I'd just give you some pointers on how to use OAA on the Oracle cloud.

To do this you need to set up an account on the Oracle cloud website (your Oracle single sign on should help with making that process a lot quicker). There are lots of websites and blog that will talk/show you through the process. Then you need to select what Database as a Service that you want to setup

OAA is not available on the Database Schema Service just yet (maybe one day they will)

Although Oracle Advanced Analytics comes pre-installed in the Oracle Enterprise Edition database (yes it is a separately priced option) when you install it on your own servers, but for the Enterprise Edition DaaS OAA is not part of it.

DaaS has the following versions

  • Standard Edition Service 
  • Enterprise Edition Service 
  • High Performance Service 
  • Extreme Performance Service

OAA is only available for these last two versions of the DaaS.

High Performance DaaS: Multitenant, Partitioning, Real Application Testing, Advanced Compression, Advanced Security, Label Security, Database Vault, OLAP, Advanced Analytics, Spatial and Graph, Diagnostics Pack, Tuning Pack, Database Lifecycle Management Pack, Data Masking & Subsetting Pack and Cloud Management Pack for Oracle Database.

Extreme Performance DaaS: In-Memory Database, RAC (Real Application Clusters), Active Data Guard, Multitenant, Partitioning, Real Application Testing, Advanced Compression, Advanced Security, Label Security, Database Vault, OLAP, Advanced Analytics, Spatial and Graph, Diagnostics Pack, Tuning Pack, Database Lifecycle Management Pack, Data Masking & Subsetting Pack and Cloud Management Pack for Oracle Database.

Oracle Advanced Analytics has two main products or components. The first is the in-database Oracle Data Mining features. This are part of the High Performance and Extreme Performance DaaS offerings. But Oracle R Enterprise is not installed on these DaaS. Well if kind of is if you can get an 11g DaaS, but at time of writing this post ORE is not part of the 12c DaaS images. So you will need to factor in some time to go and install ORE, if you need to use it.

I've been lucky to have one of these DaaS with OAA trials and with thanks to Thomas Kurian he has extended these trials to 12 months for all Oracle ACE Directors. Thank you Thomas.

When you get your DaaS setup you just need to configure your connection privileges, ssh, etc and away you go. All you need to do is to move your data across the internet to your own Oracle DaaS, and once it is in the DaaS all your OAA and other analytics is performed on the Database Server. Only the results are returned to you and displayed in your tool. This significantly reduces the processing time for your data and removes the need to constantly extract your data (in whole or in parts) to feed into other advanced analytics tools.

So if you haven't tried Oracle Advanced Analytics yet, then go ahead and setup your free trial of Oracle DaaS and try it out. You never know what you might discover by using Oracle Advanced Analytics (in the cloud)

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Tuesday, March 22, 2016

Configuring RStudio Server for Oracle R Enterprise

In this blog post I will show you the configurations that are necessary for RStudio Server to work with Oracle R Enterprise on your Oracle Database server. In theory if you have just installed ORE and then RStudio Server, everything should work, but if you encounter any issues then check out the following.

Before I get started make sure to check out my previous blog posts on installing R Studio Server. The first blog post was installing and configuring RStudio Server on the Oracle BigDataLite VM. This is an automated install. The second blog post was a step by step guide to installing RStudio Server on your (Oracle) Linux Database Server and how to open the port on the VM using VirtualBox.

Right. Let's get back to configuring to work with Oracle R Enterprise. The following assumes you have complete the second blog post mentioned above.

1. Edit the rserver.conf files

Add in the values and locations for RHOME and ORACLE_HOME

sudo vi /etc/rstudio/rserver.conf
    rsession-ld-library-path=RHOME/lib:ORACLE_HOME/lib

2. Edit the .Renviron file.

Add in the values for ORACLE_HOME, ORACLE_HOSTNAME and ORACLE_SID

cd /home/oracle
sudo vi .Renviron
    ORACLE_HOME=ORACLE_HOME
    ORACLE_HOSTNAME=ORACLE_HOSTNAME
    ORACLE_SID=ORACLE_SID
 
export ORACLE_HOME
export ORACLE_HOSTNAME
export ORACLE_SID

3. To access the Oracle R Distribution

Add the following to the usr/lib/rstudio-server/R/modules/SessionHelp.R file for the version of Oracle R Distribution you installed prior to installing Oracle R Enterprise.

.rs.addFunction( "httpdPortIsFunction", function() {
   getRversion() >= "3.2"
})

You are all done now with all the installations and configurations.

Thursday, March 17, 2016

Installing RStudio Server on an (Oracle) Linux server

In a previous blog post I showed how you can install and get started with using RStudio on a server by using RStudio Server. My previous post showed how you could do that on the Oracle BigDataLite VM. On this VM everything was nicely scripted and set up for you. But when it comes to installing it on a different server, well things can be a bit different.

The purpose of this blog post is to go through the install steps you need to follow on your own server or Oracle Database server. The following is based on a server that is setup with Oracle Linux. (I'm actually using the Oracle DB Developer VM).

1. Download the latest version of RStudio Server.

Use the following link to download RStudio Server. But do a quick check on the RStudio server to get the current version number.

wget https://download2.rstudio.org/rstudio-server-rhel-0.99.892-x86_64.rpm

The following shows you what you will see when you run this command.

--2016-03-16 06:22:30--  https://download2.rstudio.org/rstudio-server-rhel-0.99.892-x86_64.rpm
Resolving download2.rstudio.org (download2.rstudio.org)... 54.192.28.107, 54.192.28.54, 54.192.28.12, ...
Connecting to download2.rstudio.org (download2.rstudio.org)|54.192.28.107|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 38814908 (37M) [application/x-redhat-package-manager]
Saving to: ‘rstudio-server-rhel-0.99.892-x86_64.rpm’

100%[============================================================>] 38,814,908  6.54MB/s   in 6.0s  

2016-03-16 06:22:37 (6.17 MB/s) - ‘rstudio-server-rhel-0.99.892-x86_64.rpm’ saved [38814908/38814908]

2. Install RStudio Server

sudo yum install --nogpgcheck rstudio-server-rhel-0.99.892-x86_64.rpm

when prompted if it is OK to install, enter y (highlighted in bold below)

Loaded plugins: langpacks
Examining rstudio-server-rhel-0.99.892-x86_64.rpm: rstudio-server-0.99.892-1.x86_64
Marking rstudio-server-rhel-0.99.892-x86_64.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package rstudio-server.x86_64 0:0.99.892-1 will be installed
--> Finished Dependency Resolution
ol7_UEKR3/x86_64                                                                    | 1.2 kB  00:00:00    
ol7_addons/x86_64                                                                   | 1.2 kB  00:00:00    
ol7_latest/x86_64                                                                   | 1.4 kB  00:00:00    
ol7_optional_latest/x86_64                                                          | 1.2 kB  00:00:00    

Dependencies Resolved

===========================================================================================================
 Package               Arch          Version             Repository                                   Size
===========================================================================================================
Installing:
 rstudio-server        x86_64        0.99.892-1          /rstudio-server-rhel-0.99.892-x86_64        280 M

Transaction Summary
===========================================================================================================
Install  1 Package

Total size: 280 M
Installed size: 280 M

Is this ok [y/d/N]: y

Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : rstudio-server-0.99.892-1.x86_64                                                        1/1
groupadd: group 'rstudio-server' already exists
rsession: no process found
ln -s '/etc/systemd/system/rstudio-server.service' '/etc/systemd/system/multi-user.target.wants/rstudio-server.service'
rstudio-server.service - RStudio Server
   Loaded: loaded (/etc/systemd/system/rstudio-server.service; enabled)
   Active: active (running) since Wed 2016-03-16 10:46:00 PDT; 1s ago
  Process: 3191 ExecStart=/usr/lib/rstudio-server/bin/rserver (code=exited, status=0/SUCCESS)
 Main PID: 3192 (rserver)
   CGroup: /system.slice/rstudio-server.service
           ├─3192 /usr/lib/rstudio-server/bin/rserver
           └─3205 /usr/lib64/R/bin/exec/R --slave --vanilla -e cat(R.Version()$major,R.Version()$minor,~+~sep=".")

Mar 16 10:46:00 localhost.localdomain systemd[1]: Started RStudio Server.
  Verifying  : rstudio-server-0.99.892-1.x86_64                                                        1/1

Installed:
  rstudio-server.x86_64 0:0.99.892-1                                                                      

Complete!

3. Open RStudio using a web browser.

Open your favourite web browser and put in the host name or the IP address of your server. In my example I'm using the Oracle DB Developer VM to demonstrate the install, so I can use localhost, followed by the port number for RStudio Server.

NewImage Log in using your Server username and password. This is oracle/oracle on the VM. NewImage

4. Use and Enjoy

If you get logged into RStudio Server then you will see a screen something like the following!

Job Done and Enjoy!


5. An Extra Step is using the Oracle DB Developer VM

If you want to use RStudio on the Oracle DB Developer VM from your local OS, then you will need to open the port 8787 on the VM. To do this power down the VM, if you have it open. The open the Network section of the VM settings. I'm using VirtualBox. And then click on the Port Forwarding.

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Click on OK to save your Port Forwarding setting and then click on the OK button again to close the Network settings for the VM.

Now start up the VM. When it has loaded and you have the desktop displayed in the VM window, you should now be able to connect to RStudio in the VM, from your local machine.

To do this open your web browser on your local machine and type in

http://localhost:8787

You should now get the RStudio login in screen that is shown in point 3 above. Go ahead, login and enjoy.

6. A little warning

Make sure to log out of RStudio when you are finished using it. If you don't then your R environment may not have been saved and you will get a message when you log in next. Now we don't want that happenings, so just log out of RStudio. You can do that by looking at the top right hand corner of the RStudio Server application.

I will have one more blog post on how you can configure RStudion Server to work with an Oracle Database server that has Oracle R Enterprise installed.

Monday, March 14, 2016

Installing RStudio Server on Oracle BigDataLite VM

A very popular tool for data scientists is RStudio. This tool allows you to interactively work with your R code, view the R console, the graphs and charts you create, manage the various objects and data frames you create, as well shaving easy access to the R help documentation. Basically it is a core everyday tool.

The typical approach is to have RStudio installed on your desktop or laptop. What this really means is that the data is pulled to your desktop or laptop and all analytics is performed there. In most cases this is fine but as your data volumes goes does does the limitations of using R on your local machine.

An alternative is to install a version called RStudio Server on an analytics server or on the database server. You can now use the computing capabilities of this server to overcome some of the limitations of using R or RStudio locally. Now you will use your web browser to access RStudio Server on your database server.

In this blog post I will walk you through how to install and get connected to RStudio Server on the Oracle BigDataLite VM.

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After starting up the Oracle BigDataLite VM and logging into the Oracle user (password=welcome1) you will see the Start Here icon on the desktop. You will need to double click on this.

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This will open a webpage on the VM that contains details of all the various tools that are installed on the VM or are ready for you to install and configure. This information contains all the http addresses and ports you need to access each of these tools via a web browser or some other way, along with the usernames and passwords you need to use them.

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One of the tools lists is for RStudio Server. This product is not installed on the VM but Oracle has provided a script that you can run to perform the install in an automated way. This script is located in:

[oracle@bigdatalite ~]$ cd  /home/oracle/scripts/

Use the following command to run the RStudio Server install script.

[oracle@bigdatalite scripts]$ ./install_rstudio.sh
The following is the output from running this script and it will be displayed in your terminal window. You can use this to monitor the progress of the installation.
Retrieving RStudio
--2016-03-12 02:06:15--  https://download2.rstudio.org/rstudio-server-rhel-0.99.489-x86_64.rpm
Resolving download2.rstudio.org... 54.192.28.12, 54.192.28.54, 54.192.28.98, ...
Connecting to download2.rstudio.org|54.192.28.12|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 34993428 (33M) [application/x-redhat-package-manager]
Saving to: `rstudio-server-rhel-0.99.489-x86_64.rpm'

100%[======================================>] 34,993,428  5.24M/s   in 10s     

2016-03-12 02:06:26 (3.35 MB/s) - `rstudio-server-rhel-0.99.489-x86_64.rpm' saved [34993428/34993428]

Installing RStudio
Loaded plugins: refresh-packagekit, security, ulninfo
Setting up Install Process
Examining rstudio-server-rhel-0.99.489-x86_64.rpm: rstudio-server-0.99.489-1.x86_64
Marking rstudio-server-rhel-0.99.489-x86_64.rpm to be installed
public_ol6_UEKR3_latest                                  | 1.2 kB     00:00     
public_ol6_UEKR3_latest/primary                          |  22 MB     00:03     
public_ol6_UEKR3_latest                                                 568/568
public_ol6_latest                                        | 1.4 kB     00:00     
public_ol6_latest/primary                                |  55 MB     00:12     
public_ol6_latest                                                   33328/33328
Resolving Dependencies
--> Running transaction check
---> Package rstudio-server.x86_64 0:0.99.489-1 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package        Arch   Version       Repository                            Size
================================================================================
Installing:
 rstudio-server x86_64 0.99.489-1    /rstudio-server-rhel-0.99.489-x86_64 251 M

Transaction Summary
================================================================================
Install       1 Package(s)

Total size: 251 M
Installed size: 251 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : rstudio-server-0.99.489-1.x86_64                             1/1 
useradd: user 'rstudio-server' already exists
groupadd: group 'rstudio-server' already exists
rsession: no process killed
rstudio-server start/running, process 5037
  Verifying  : rstudio-server-0.99.489-1.x86_64                             1/1 

Installed:
  rstudio-server.x86_64 0:0.99.489-1                                            

Complete!
Restarting RStudio
rstudio-server stop/waiting
rsession: no process killed
rstudio-server start/running, process 5066

When the installation is finished you are now ready to connect to the RStudio Server. So open your web browser and enter the following into the address bar.

http://localhost:8787/

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The initial screen you are presented with is a login screen. Enter your Linux username and password. In the case of the BigDataLite VM this will be oracle/welcome1.

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Then you will be presented with the RStudio Server application in your web browser, as shown below. As you can see it is very similar to using RStudio on your desktop. Happy Days! You are now setup and able to run RStudio on the database server.

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Make sure to log out of RStudio Server before closing down the window.

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If you don't log out of RStudio Server then the next time you open RStudio Server your session will automatically open. Perhaps this is not the best for security, so try to remember to log out each time.

By now using RStudio Server on the Oracle Database server I can not get some of the benefits of computing capabilities of this server. Although there are still the typical limitations with of using R. But now I access RStudio on the database server and process the data on the database server, all from my local PC or laptop.

Everything is nicely setup and ready for you to install on the BigDataLite VM (thank you Oracle). But what about when we want to install RStudion Server on a different server. What are the steps necessary to install, configure and log in. Yes they should be similar but I will give a complete list of steps in my next blog post.

Tuesday, March 8, 2016

OUG Ireland 2016: a roaring success

Last week we had out OUG Ireland annual conference. Traditionally it has been a 1 day conference and in the past few years we have had an extra day where we had the likes of Tom Kyte (we miss you), Maria Colgan, etc give a full day seminar.

But over the past few years a few of the committee have been constantly asked about when we would have a second day of presentations (just like we have for the one day event).

After lots of discussions and looking at budgets and relooking at budgets, then looking at possible alternative venues we worked out a way to have a 2 day conference.

So last week we had our new 2 day conference in the Gresham hotel in the centre of Dublin. Check out the agenda here.

The day before the conference (on the Wednesday) I had arranged for a speakers drinks meet-up. There was lots of people travelling in from all across Europe to present, so this was a good way to get everyone together over a few beers. We met in a micro brewery in Dublin. It was a fun evening with people coming and going throughout the evening and some people stayed for the entire evening. (Oh my poor credit card!)

On Thursday we all got together with all the 275+ attendees at in the Gresham Hotel.

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We had 4 tracks that covered DBA, Developer, Business Analytics and Apps. The rooms were just the right size for these tracks, with most of the rooms being full for each of the presentations. With some presentations there was people standing around the sides and down the back. All of this helped to add to the atmosphere. The exhibitors were only there for the first day. This is something we need to look at for next year to get them to attend the 2 days.

On the Wednesday evening we had an Oracle ACE Dinner that was sponsored by OTN (THANK YOU) and they also provided the ACEs with conference ribbons. Also thank you to the OTN ACE programme for providing some travel support to the various ACE Directors.

On the second day (Friday) we kind of got of a slow start for the first sessions of the day, but this must have been due to the snow we had in Dublin that morning. But from the second sessions onwards we were back to packed rooms. Because of this great turn out on the second day, helps us justify having a 2 day conference next years.

I got a chance to talk to lots and lots of people over the course of the 2 days and every single person was talking about the conference being 2 days and Please doing this next year and the year after and the year after, etc.

One of the highlights from the end of the second day was the Q&A panel discussion on the Oracle Optimiser. On this panel we had Jonathan Lewis, Joze Senegacnik and Martin Widlake. I managed to rope in a friend Alan Kelly to be the quiz master for the session. The Q&A Panel session was scheduled for 45minutes. But despite the best efforts to encourage the attendees to finished up, they kept on asking questions and the panel kept on answering. This session ran for an additional 45 minutes. Yes that was a 90 minute session.

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All in all the 2 day OUG Conference was a roaring success and I would like to thank all the speakers, the attendees and the various sponsors for making this event happen.

Check out Debra's blog post about the conference.

Check out Martin Widlake's blog post about the conference.

Oh and there was a Yeast and Sourdough Bread Making symposium during OUG Ireland where a number of the peoples got to talk about and share their experiences on making bread.

Thursday, February 25, 2016

Recoding variable values using ore.recode

Oracle R Enterprise comes with a vast array of features that not really documented anywhere. One of these features that I've recently found useful is the ore.recode() function.

The following code illustrates how you can records the values in an existing attributes or (more specifically in this example) how you can create a new attribute based on the values in another attribute.

The data set that I'm using is the White Wine data set that can be found on the UCI Machine Learning Repository Archive website. You can download this data set and load it into a table in your Oracle schema using just two commands.

> WhiteWine = read.table("http://archive.ics.uci.edu/ml/machine-learning-databases/wine-quality/winequality-white.csv",
                        sep=";", header=TRUE)
> ore.create(WhiteWine, table="WHITE_WINE")

This data set has an attribute called "quality". This "quality" attribute contains values ranging from 2 to 8, and indicates the quality of the wine.

A typical task you may want to do is to relabel values into attributes to something a bit more meaningful or to group some values into a more standardised value.

To demonstrate this I want to create a new attribute that contains a description of the type of wine (and who I might share it with).

In this case, and to allow for other values in future versions of the data sets I've coded up the following:

quality  grade
-------  ----------------
1        Paint Stripper
2        Vinegar
3        Barely Drinkable
4        For the in-laws
5        For my family
6        To share with friends
7        For cooking
8        To share with my wife
9        Mine all Mine

The next step we need to perform is to gather some information about the values in the "quality" attribute. We can use the table command to quickly perform the aggregations, and then use the marplot function to graph the distributions.

> WHITE_WINE2 <- WHITE_WINE
> table(WHITE_WINE2$quality)
> barplot(table(WHITE_WINE2$quality), xlab="Wine Quality Ranking")

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Now we are ready to perform the recoding of the values using the ore.recode() function.

> WHITE_WINE2$grade <- ore.recode(WHITE_WINE2$quality, old=c(1, 2, 3, 4, 5, 6, 7, 8, 9), 
                     new=c("1-Paint Stripper", "2-Vinegar", "3-Barely Drinkable",
                           "4-For the in-laws", "5-For my family", "6-To share with friends", 
                           "7-For cooking", "8-To share with my wife", 
                           "9-Mine all Mine"))

You can now go and inspect the data, perform a frequency count and compare the values with what we had previously.

> head(WHITE_WINE2[,c("quality", "grade")]) 
> table(WHITE_WINE2$grade) 

The final step is to write the newly modified data set back to your Oracle schema into a new table. This is to ensure that the original data is modified so that it can be used or reused later.

> ore.create(WHITE_WINE2, "WHITE_WINE2")

Thursday, February 18, 2016

OUG Ireland 2016: APPs Track highlights

Today I was joined by Debra Lilly who is the APPs track lead and conference chair for OUG Ireland. Debra lets us know what we can look forward to on the APPs track at this years conference.

Check out Debra's video.

Click on the image below to get more details of the agenda and to register for this 2 day conference.

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Follow the conference and OUG Ireland on twitter using #oug_ire