Diversity Measures

Measures of Diversity in Classi

Diversity among the members of a team of classiiers is deemed to be a key issue in classiier combination. However, measuring diversity is not straightforward because there is no generally accepted formal deenition. We have found and studied ten statistics which can measure diversity among binary classiier outputs (correct or incorrect vote for the class label): four averaged pairwise measures (...

Divergence Measures as Diversity Indices

Entropy measures of probability distributions are widely used measures in ecology, biology, genetics, and in other fields, to quantify species diversity of a community. Unfortunately, entropy–based diversity indices, or diversity indices for short, suffer from three problems. First, when computing the diversity for samples withdrawn from communities with different structures, diversity indices ...

Using ecological diversity measures with bacterial communities.

Abstract There are many ecological diversity measures, but their suitability for use with highly diverse bacterial communities is unclear and seldom considered. We assessed a range of species richness and evenness/dominance indices, and the use of species abundance models using samples of bacteria from zinc-contaminated and control soils. Bacteria were assigned to operational taxonomic units (O...

Objective and Subjective Measures of Diversity :

Analysis of Various Evaluation Measures for Diversity

Evaluation measures play a vital role in analyzing the performance of a system, comparing two or more systems, and optimizing systems to perform some task. In this paper, we analyze and highlight the strengths and weaknesses of commonly used measures for evaluating the diversity in search results. We compare MAP-IA, α-nDCG, and ERR-IA using data from TREC’09 web track diversity runs and simulat...