similarity coefficient

similarity coefficient

[‚sim·ə′lar·əd·ē ‚kō·i‚fish·ənt]
(systematics)
In numerical taxonomy, a factor S used to calculate the similarity between organisms, according to the formula S = ns /(ns + nd ), where ns represents the number of positive features shared by two strains, and nd represents the number of features positive for one strain and negative for the other.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
PFGE conducted for strains of the most prevalent serogroups (O26, O103, O121, and O145) showed that the patterns of O26 strains were heterogeneous (similarity coefficient range 49%-94%) except for 5 strains (Figure 2).
This is the already presented Jaccard similarity coefficient, which is, according to these authors, superior to other coefficients.
We constructed plots of absolute and relative oxide abundance and calculated similarity coefficients, using both the conventional similarity coefficient (SC) and the computationally more intensive weighted SIMAN coefficient.
For example, accession PI 229775 from Iran clustered with PI 221915 from Afghanistan, with a high similarity coefficient (0.73).
Specifically, the similarity coefficient method and the hierarchical clustering algorithm have been successfully employed to form machine part groups using 0-1 machine-part incidence matrices of the PFA.
Similarity coefficient across 25 genotypes of turmeric started from 0.00 to 0.76.
The lowest similarity coefficient was 0.462, observed between accessions 109 and 135, whilst the highest one was 0.962, observed between accessions 68 and 126, with an average of 0.726.
Clustering was done using symmetry matrix of similarity coefficient using UPGMA using SHAN module of NTSYS-pc.
The UPGMA-based dendrogram has clearly put all the samples in three major groups at average similarity coefficient (0.12) as cut-off value.
2.5 (Applied Maths, Kortrijik, Belgium) using the interpretative criteria by Dice similarity coefficient.
The hierarchical cluster tree analysis showed that the citrus genotypes used for the current investigations broadly divided into two major groups at similarity coefficient of 0.53 (Fig.
The Miltenburg and Zhang[4] analysis is restricted to array-based clustering techniques, similarity coefficient based techniques, and seed-based techniques.