menhinick {abdiv} | R Documentation |
Menhinick's richness index
Description
Menhinick's richness index
Usage
menhinick(x)
Arguments
x |
A numeric vector of species counts. |
Details
For a vector x
of raw species counts, the Menhinick's richness index
is , where
is the total number
of counts and
is the total number of species observed.
This index is appropriate only for raw counts, not transformed counts or proportions.
Equivalent to menhinick()
in skbio.diversity.alpha
.
Value
Menhinick's richness index, . The index is undefined when
the total number of counts is 0, in which case we return
NaN
.
Examples
x <- c(15, 6, 4, 0, 3, 0)
menhinick(x)
[Package abdiv version 0.2.0 Index]