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Student
Title
Supervisor
Faculty
Educational Programme
Final Grade
Year of Graduation
Natal`ya Kuzneczova
Random Forest Visualization
School of Software Engineering
Master’s programme
2014
Classi\x0ccation is the process of assigning a class label to an observation based on its proprieties or attributes. A classi\x0ccation algorithm is applied to a data set, producing a model. By studying the model, insights about the data set structure can be gained. The bene\x0cts that a model can bring depend on the model. In this work, a Random Forest model is used for the analysis of data. A Random Forest model is explored by means of visualization. The results include this report and the prototype of a visualization analysis tool. The tool, named ReFINE for Random Forest INspEctor, consists of several visualizations for a Random Forest model. ReFINE provides visualizations for Random Forest components - trees, and its special feature: proximity measure, variable importance, interactions and prototypes. Each of these aspects is presented with a di\x0berent visualization technique; all the visualizations are integrated together to show the connections between them and allow a user to discover patterns in data sets. The e\x0bectiveness of the approach is validated with various data sets, including generated and real data. As a result, ReFINE allows to investigate data, its most importance variables, theirs split points, connection between instances and their distribution.

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