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We have studied the Scilab tool in a data mining scheme in a previous tutorial . We noted that Scilab is well adapted for data mining. It is a credible alternative to R. But, we observed also that the available toolboxes for statistical processing and data mining are not very numerous compared to those of R. In this second tutorial, we evaluate the behavior of Scilab when we deal with a dataset with 500,000 instances and 22 attributes. We compare its performances with those of R. Two criteria are used: the memory occupation measured in the Windows task manager; the execution time at each step of the process. It is not possible to obtain an exhaustive point of view. To delimit the scope of our study, we have specified a standard supervised learning scenario: loading a data file, building the predictive model with linear discriminant analysis approach, calculating the confusion matrix and resubstitution error rate. Of course, this study is incomplete. But it seems that Scilab is less eff...

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I know the name "Scilab" for a long time (http://www.scilab.org/en). For me, it is a tool for numerical analysis. It seemed not interesting in the context of the statistical data processing and data mining. Recently a mathematician colleague spoke to me about this tool. He was surprised about the low visibility of Scilab within the data mining community, knowing that it proposes functionalities which are quite similar to those of R software. I confess that I did not know Scilab from this perspective. I decided to study Scilab by setting a basic goal: is it possible to perform simply a predictive analysis process with Scilab? Namely: loading a data file (learning sample), building a predictive model, obtaining a description of its characteristics, loading a test sample, applying the model on this second set of data, building the confusion matrix and calculating the test error rate. We will see in this tutorial that the whole task has been completed successfully easily. Scilab ...

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First of all, let me introduce you to all my wishes of happiness, health and success for the year 2014 which begins. For Tanagra, 2014 is of quite particular importance. 10 Years ago almost to the day, the first version of the software has been put on line. Designed originally as a tool for the students and researchers in the data mining domain, the project has changed a bit of nature in recent years. Today, Tanagra is an academic project which provides a point of access to the statistical and the data mining techniques. It is addressed to students, but also to the researchers of other areas (psychology, sociology, archeology, etc.). It allows, I hope, make it more attractive, more clear, the implementation of these techniques on real case studies. This mutation was accompanied by a refocusing of my activity. The Tanagra software is still evolving (we are at version 1.4.50), new methods are added, existing components are regularly improved, but at the same time I put emphasis on the do...