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Decision Trees is a directed technique. Your target variable is the one that holds information about a particular decision, divided into a few discrete and broad categories (yes / no; liked / partially liked / disliked, etc.). You are trying to explain this decision using other gleaned information saved in other variables (demographic data, ...

It is alive! It was really hard to make the choices. Nevertheless, the schedule is public now. To everybody that submitted proposals – thank you very much again! We are sorry we cannot accommodate everybody. Please note that even if you were not selected, we would be happy to see you in Ljubljana.

With start of October, we closed the call for speakers for SQL Saturday Slovenia. We are really excited by the number of speakers and the number of sessions they submitted. We got 51 different speakers from 20 different countries submitting 125 session proposals! You can see the breakdown of number of speakers and sessions per country in the ...

I am continuing with my data mining and machine learning algorithms series. Naive Bayes is a nice algorithm for classification and prediction.
It calculates probabilities for each possible state of the input attribute, given each state of the predictable attribute, which can later be used to predict an outcome of the predicted attribute based on ...


I am finishing my list of conferences and seminars I am attending in the second half of the year 2015. Here is my list. Kulendayz 2015 – September 4th5th. Although I will have huge problems to get there on time, I would never like to miss it. I have one talk there. SQL Saturday #413 Denmark – September 17th19th. You can join me already on ...

This is a bit different post in the series about the data mining and machine learning algorithms. This time I am honored and humbled to announce that my fourth Pluralsight course is alive. This is the Data Mining Algorithms in SSAS, Excel, and R course. besides explaining the algorithms, I also show demos in different products. This gives you even ...

So we are back. PASS SQL Saturday is coming to Slovenia again on December 12th, 2015. Remember last two years? We had two great events. According to feedback, everybody was satisfied and happy. Let's make another outstanding event! How can you help?
First of all, these events are free for attendees. Of course, this is possible only because ...

Support vector machines are both, unsupervised and supervised learning models for classification and regression analysis (supervised) and for anomaly detection (unsupervised). Given a set of training examples, each marked as belonging to one of categories, an SVM training algorithm builds a model that assigns new examples into one category. An SVM ...

Principal component analysis (PCA) is a technique used to emphasize the majority of the variation and bring out strong patterns in a dataset. It is often used to make data easy to explore and visualize. It is closely connected to eigenvectors and eigenvalues.
A short definition of the algorithm: PCA uses an orthogonal transformation to convert ...
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