On Granular Rough Computing: Handling Missing Values by Means of Homogeneous Granulation

• Main Authors: Piotr Artiemjew, Krzysztof Krzysztof Ropiak
• Format: Article
• Language: English
• Published: MDPI AG 2020-02-01
• Series: Computers
• Subjects: granular rough computing; missing values handling; homogeneous granulation
• Online Access: https://www.mdpi.com/2073-431X/9/1/13

This paper is a continuation of works based on a previously developed new granulation method—homogeneous granulation. The most important new feature of this method compared to our previous ones is that there is no need to estimate optimal parameters. Approximation parameters are selected dynamically depending on the degree of homogeneity of decision classes. This makes the method fast and simple, which is an undoubted advantage despite the fact that it gives a slightly lower level of approximation to our other techniques. In this particular article, we are presenting its performance in the process of missing values absorption. We test selected strategies on synthetically damaged data from the UCI repository. The added value is to investigate the specific performance of our new granulation technique in absorbing missing values. The effectiveness of their absorption in the granulation process has been confirmed in our experiments.