Sürüş olayları veri setinde boyut indirgeme tekniklerinin karşılaştırılması

When investigating on problematical and indefinite areas with data exploring tools such as machine learning or DM algorithms, weight of data attributes effecting classification result is generally unknown issue. Using entire feature set might cause the low classification success. Dependency existance among features, (near) zero variance features, outlier and missing data on feature may harm classification accuracy. To increase classification success and learn feature effect on classification, dimension reduction techniques such as feature subset selection and feature extraction are used. Feature subset selection and feature extraction are the two different applied methods for reducing the dimension set. While feature subset selection methods is focusing to find the most important features that affect the classification result, feature extraction methods are dealing with the creating of new attributes as a linear or non linear combination of initial feature set. Both methods are used on the investigation of classification, clustering and regression problems. Feature extraction methods sacrifice the explanation of the problems, when they combine the existent features to create new ones. On the other hand, features subset selection methods help to pick the most important features by ordering attributes according to their ranking methods. If classification researches are not satisfying or contribution of the attributes that affecting the classification is not known deeply, both methods can be used to understanding the importance of the attributes, and increase classification accuracy.