Simple Matching Coefficient

`SMC = (M00 + M11) / (M00 + M11 + M10 + M01)`

Enter a value for all fields

The Simple Machine Coefficient calculator computes the coefficient for comparing the similarity and diversity of sample sets.

INSTRUCTION: Enter the following:

(M₀₀) Total number of attributes where A and B are both zero (0)
(M₁₁) Total number of attributes where A and B are both one (1)
(M₀₁) Total number of attributes where A is zero (0) and B one (1)
(M₁₀) Total number of attributes where A is one (1) and B is zero (0)

Simple Matching Coefficient (SMC): The calculator returns the coefficient as a real number. However this can be automatically converted to a percentage via the pull-down menu.

The Math / Science

The Simple Matching Coefficient is a coefficient that indicates the degree of similarity of two communities based on the number of species that they have in common. The formula for the Simple Matching Coefficient is:

SMC = (M₀₀ + M₁₁) / (M₀₀ + M₁₁ + M₁₀ + M₀₁)

where:

SMC = Simple Matching Coefficient
M₀₀ = Total number of attributes where A and B are both zero (0)
M₁₁ = Total number of attributes where A and B are both one (1)
M₀₁ = Total number of attributes where A is zero (0) and B one (1)
M₁₀ = Total number of attributes where A is one (1) and B is zero (0)

Community Statistics Calculators

Reference

^ The description of Jaccard index is from Wikipedia: en.wikipedia.org/wiki/Jaccard index