Overview

similarity coefficient


Show Summary Details

Quick Reference

Any measure of the similarity of two samples. In ecological work, the similarity index devised in 1913 by J. Czekanowki has been widely used. This measures similarity as C = 2W/(a + b), where a and b are the quantities of all the plants (or another commodity) found in the 2 stands, or other units to be compared, and W is the sum of the lesser values for those species common to both units. Complete similarity thus scores 1, complete dissimilarity 0. See also affinity index.

Subjects: Plant Sciences and Forestry.


Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.