lpi_population: Calculate log-ratio growth rates and LPI trend at the...

In ReseauBiodiversiteQuebec/tableaulpi: Tableau de l'Indice Planete Vivante

Calculate log-ratio growth rates and LPI trend at the population level

Description

Calculates the log-ratio change in raw population abundances for each population time series in the obs dataframe and calculates the (LPI) index values for the time series.

Usage

lpi_population(x)

Arguments

x	Data frame of Atlas observations table joined with taxa table.

Value

Data frame 'x' with new columns dt which holds a list of log-ratio growth rates, mean_dt which holds the arithmetic mean log-ratio growth rate for the time series, and lpi which holds a list of index values calculated from the growth rates (dt).

ReseauBiodiversiteQuebec/tableaulpi documentation built on March 30, 2022, 1:46 p.m.