In a previous blog post I talked about and showed some of the typical statistical methods to evaluate the classification models that you develop. Click to see this (first) blog post.
In this blog post I want to show you how you can go about evaluating your classification models that you develop using Oracle Data Miner (part of SQL Developer).
What I'm not going to show you here is how to develop classification models using (more...)
When you are working on building classification models you will need some ways of measuring the effectiveness of each model that you will build. This measurement/evaluation is perform during the model build process.
Typically the model build process consists of 2 steps (I'm assuming all data preparation etc has been completed:
- Build the model: During this step you will feed in a portion of your data set to the data mining algorithm. Typical this data (more...)
As the volume of the data in your tables grows, particularly in the big data world, you may run into some memory issues or package restrictions with pulling down the tables to your R environment.
Some of the R packages and drivers have some recommended numbers or limits for the number of records that can be fetched.
In the following example I'm looking at downloading a table with 300K records from an Oracle Database. I've (more...)
The following is not something new but something that I have put together this evening, and I mainly make the following available as a note to myself and what I did. If you find it useful or interesting then you are more than welcome to use and share. You will also find lots of similar solutions on the web.
This evening I was playing around the the Text Mining (tm) package in R. So I (more...)
As 2014 draws to a close I working on finishing off a number of tasks and projects. One of these tasks is an annual one for me. The task is to list all the things I've done as an Oracle ACE Director. If has been a very busy year, not just with ACE activities but also work wise too. That will explain why I have been a bit quiet on the blogging side of things (more...)
If you are downloading the EA1 of SQL Developer that includes Oracle Data Miner (ODMr), and you intend to use Oracle Data Miner then you will need to update the ODMr Repository.
You could do it the hard way and run the upgrade repository sql scripts that are located in the ...sqldeveloper-220.127.116.11.29-no-jresqldeveloperdataminerscripts directory.
Or you could do it the easy way and let the inbuilt functionality in Oracle Data Miner do (more...)
A few days ago the first Early Adaptor release of SQL Developer 4.1 (EA1) was made available. You can go ahead and download it from here and make sure to check out the blog post by Jeff Smith on some install and setup that is required around the latest version of Java.
I've been using SQL Developer since its very first release, so getting my hands on a new release is very exciting. There (more...)
The UKOUG annual conferences commence on Sunday 7th December and run until Wednesday 10th.
Like previous years there are two conferences, one called TECH15 and the other is called APPS15. You might guess what each conference is about!!.
This year these conferences are being held at the same time and in the same venue. But they are separate conferences!.
This year I've been very lucky (or very unlucky) to have 3 presentations at these conferences. (more...)
OUG Ireland Call for submissions is now open.
The closing date for submissions is 5th January, 2015.
and the submission webpage can be found here.
The OUG Ireland conference will be on Thursday 19th March. Yes it is only a one day conference :-( but we will be 5 or 6 or more streams. So there will be something for everyone and plenty of choice.
On Friday 20th March we will have Maria Colgan, formally (more...)
With the release of the Oracle Database 18.104.22.168 there was a number of new features and options. Most of the publicity has been around the in-Memory option. But there was lots of other features for the DBA and a few for the developer.
One of the new SQL functions is the APPROX_COUNT_DISTINCT(). This function is different to the tradition count distinct, COUNT(DISTINCT expression), in that is performs an approximate count distinct. (more...)
When Oracle Data Miner (ODMr) 4.0 (which is part of SQL Developer) came out back in late 2013 there was a number of new features added to the tool. One of these was a Graph node that allows us to create various graphs and charts that include Line, Scatter, Bar, Histogram and Box plot.
I've been using this node recently to produce graphs and particularly scatter plots. I've been using the scatter plots to (more...)
In this post I want to show some example of using a new feature in 12c for selecting the first X number of records from the results set of a query.
See the bottom of this post for the background and some of the reasons for this post.
Before we had the 12c Database if we only wanted to see a subset or the initial set of records from the results of a query we (more...)
The following steps are what I did for installing 22.214.171.124 on Windows.
1. Download the Oracle installation ZIP files from the Oracle Downloads page.
2. Unzip the two 12c downloads files into the same directory.
3. Go to the newly created directory (it is probably called 'database') and you will find a file called setup.exe. Double click on this file.
After a couple of seconds you will see the Oracle Database (more...)
Oracle Open World is coming up in a few days time. This is a huge event that also incorporates Jave One and various other smaller conferences that are for specific product areas and for partners.
I will be presenting at Oracle Open World this year and I'll also be taking part in a number of other sessions/events including the Oracle ACE Directors briefing. Check out my blog post that list these sessions/events.
In addition to (more...)
I had an previous blog post listing the various Oracle Advanced Analytics sessions/presentation at Oracle Open World 2014.
After trawling through the list of Hands-on-Labs it was disappointing to see that there was no Oracle Data Mining or Oracle R Enterprise hands-on-labs this year.
But there is a hands on lab that looks are how to use the new SQL for Big Data feature (announced over the summer).
Here is the abstract for the session.
With Oracle Open World just a few days away now, I was going through the list of presentations that are focused on using the Oracle Advanced Analytics Option. These will cover Oracle Data Miner and Oracle R Enterprise.
So I've decided to share this list with you :-) and hopefully I will get to see you are some or all of these sessions.
We have all been in the position of trying to find the name of a command in a language, particularly if you are not totally sure of the full command name.
I've been working with R a lot recently and in particular Oracle R Enterprise. I was always trying to remember what the full command name was. Then I found the apropos
function. The apropos function allows you to search R for commands based on (more...)
Oracle has released an update to their Oracle R Enterprise software. We now have ORE 1.4.1 and this seems to have been released on the past day or so.
Here are the links to the important stuff:
ORE 1.4.1 Release Note
ORE 1.4.1 User Guide
ORE 1.4.1 Installation Guide
ORE 1.4.1 Download page
One of the main features of this new release is that it (more...)
The next set of Ireland Oracle User Group SIG meetings will be on Wednesday 24th August. This will be a super SIG event with the following SIGs being run in parallel and all in one venue (Jurys Inn, Customs House, Dublin).
OUG Ireland BI & EPM SIG Meeting
OUG Ireland Technology SIG Meeting
OUG Ireland HCM SIG Meeting
Click on the links above for each SIG to get the details of agenda. There is a (more...)
This day 3 weeks time (on the 24th Sept) I will be heading out to San Francisco for Oracle Open World. Over the course on 9 days I will be taking part in the Oracle ACE Director briefing and in Oracle Open World. The following outlines my main activities, sessions that I'm presenting at and sessions that I have been asked to attend.
25th-26th Sept. I will be at the Oracle ACE Director briefing. This (more...)