Rao DISC-based similarity coefficient: a measure of similarity with respect to feature differences. (5th April 2010)

• Record Type: Journal Article
• Authors: Mata, May Anne E.
• Is Part Of: International journal of data analysis techniques and strategies. Volume 2:Number 2(2010)
• Page Start: 181
• Page End: 198
• Publication Date: 2010-04-05
• Subjects: data analysis -- PCoA -- Rao dissimilarity coefficient -- DISC -- Rao diversity coefficient -- DIVC -- quadratic entropy -- similarity coefficients -- feature differences -- principal coordinate analysis; Electronic data processing -- Periodicals; Database searching -- Periodicals; 005
• Languages: English
• ISSNs: 1755-8050

Abstract

In this paper, I defined a similarity coefficient, called Rao DISC-based similarity coefficient (DbSC), which takes into consideration feature differences as a factor of measuring similarity. Such coefficient was based from Rao dissimilarity coefficient (DISC) and diversity coefficient (DIVC) which are mostly applicable to ecology. The performance of Rao DbSC was compared with the existing similarity coefficients using three different data sets. Principal coordinate analysis (PCoA) and Spearman's rank correlation were made to demonstrate how Rao DbSC differs from other existing similarity coefficients. The obtained results gave emphasis on the relevance of considering the differences among features when comparing samples. Generally, this paper has illustrated the possibility of taking feature differences through some notion of distance as basis for determining similarity between samples.