Data Mining with Weka MOOC

Um curso em vídeo sobre a utilização do WEKA para data mining

Um curso em vídeo sobre a utilização do WEKA para data mining

Welcome to the free online course Data Mining with Weka

This 5 week MOOC introduced data mining concepts through practical experience with the free Weka tool.

The course featured:

The course will run again in early March 2014. To get notified about dates (enrolment, commencement), please subscribe to the announcement forum.

You can access the course material (videos, slides, etc) from here.

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WEKA: Remote Experiment

permite computação distribuida usando um servidor com algoritmos WEKA

permite computação distribuída usando um servidor com algoritmos WEKA

Remote experiments enable you to distribute the computing load across multiple computers. In the following we will discuss the setup and operation for HSQLDB and MySQL.

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LIBSVM — A Library for Support Vector Machines

Página dos autores da biblioteca LIBSVM, a mais usada para SVM

Página dos autores da biblioteca LIBSVM, a mais usada para SVM

LIBSVM — A Library for Support Vector Machines

Chih-Chung Chang and Chih-Jen Lin


Version 3.17 released on April Fools’ day, 2013. We slightly adjust the way class labels are handled internally. By default labels are ordered by their first occurrence in the training set. Hence for a set with -1/+1 labels, if -1 appears first, then internally -1 becomes +1. This has caused confusion. Now for data with -1/+1 labels, we specifically ensure that internally the binary SVM has positive data corresponding to the +1 instances. For developers, see changes in the subrouting svm_group_classes of svm.cpp.
We now have a nice page LIBSVM data sets providing problems in LIBSVM format.
A practical guide to SVM classification is available now! (mainly written for beginners)
LIBSVM tools available now!
We now have an easy script (easy.py) for users who know NOTHING about svm. It makes everything automatic–from data scaling to parameter selection.
The parameter selection tool grid.py generates the following contour of cross-validation accuracy. To use this tool, you also need to install python and gnuplot.

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wekalist – resposta a questões

Um fórum de discussão sobre os algoritmos do WEKA

Um fórum de discussão sobre os algoritmos do WEKA

WEKA

This forum is an archive for the mailing list wekalist@list.scms.waikato.ac.nz (more options) Messages posted here will be sent to this mailing list.

WEKA machine learning software discussion

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WEKA Cost Benefit Analysis

Análise de custo benefício para avaliação de modelos

Análise de custo benefício para avaliação de modelos

The Cost/Benefit analysis component is a new visualization tool that was released in Weka versions 3.6.2 and 3.7.1. The tool is particularly useful for the analysis of predictive analytic outcomes for direct mail campaigns (or any ranking application where costs are involved). It allows the user to explore various cost/benefit tradeoffs by interactively selecting different population sizes from the ranked list of prospects or by varying the threshold on the predicted probability of the positive class.

The Cost/Benefit analysis tool is available from both the Explorer and Knowledge Flow user interfaces. In the figure below, the Knowledge Flow is being used to build a predictive model for a real-world direct mail application. The data is historical campaign data from a mail out to solicit donations to a charitable organization. The data set contains 47,706 records with 476 variables (summary variables for donor lifetime giving history, overlay demographics etc.). The percentage of donors in the data is approximately 5%. A 10-fold cross-validation is used to generate predictions from a naive Bayes classifier, and these are then passed to the Cost/Benefit analysis tool.

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Weka: Decision Trees Tutorial

Tutorial com exercicios sobre árvores de decisão

Tutorial com exercicios sobre árvores de decisão

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Text categorization with Weka

ferramentas do WEKA para text mining

ferramentas do WEKA para text mining

Table of Contents

Import
Directories
CSV files
Third-party tools
Working with textual data
Conversion
Stopwords
UTF-8
Examples
See also
Links

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Weka Video Tutorials

videos Weka

videos Weka

This videos contains many answers that many people asked about.
Alguns não estão a funcionar.

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