benthos (version 1.3-4)

margalef: Margalef Index of Diversity

Description

Margalef Index of Diversity is given by $$D = \frac{S-1}{\ln(N)}$$

For \(N=1\), the index is set to 0.

Usage

margalef(.data = NULL, taxon, count)
margalef_(.data = NULL, taxon, count)

Arguments

.data

data in a data.frame, data_frame, data.table, database etc.

taxon

taxa names (character)

count

counts (numeric)

Value

Margalef diversity index (numeric vector of length 1)

Functions

• margalef_: version suitable for calling from a function (see package lazyeval).

Examples

# NOT RUN {
margalef(
    taxon = c("Euspira pulchella", "Nephtys cirrosa"), 
    count = c(4, 6)
)
 
# }