calcPSI {biotic}

Calculate PSI index

Description

Calculates PSI index for invertebrate samples. for invertebrate samples.

Usage

calcPSI(df, type = "num")

Arguments

df

A dataframe containing list of taxa in first column, followed by columns of abundances with sample names in header row.

type

Indicates format of data. Options are "num" for numeric data, "log" for integer log abundance categories (1-5) or "alpha" for alphabetic abundance categories (A-E). Default value is "num".

Value

A data frame consisting of a column of index values with samples in rows.

Examples

# calculate the PSI index for the Braid Burn dataset
# data are alphabetic log abundance categories, so type is "alpha"

calcPSI(braidburn, "alpha")