sample_by_individuals: Subsample a dataset by individuals

In boydorr/sampling: Sampling code for biodiversity course

Description

Subsample a dataset so we only count some of the individuals - either sampling until a fixed limit is met, or sampling a fraction of total, simulating a fractional sampling effort or over a fraction of the area of each subcommunity.

Usage

sample_by_individuals(dataset, count, fraction)

Arguments

dataset	A data frame containing abundance or incidence data
count	The number of individuals to retain (or fewer if fewer present)
fraction	The fraction of individuals in each subcommunity to retain

Value

The subsampled dataset as a tibble

Examples

library(iNEXT)
data(bird)
sample_by_individuals(bird, count = 100)

data(ciliates)
eto.incidence <- ciliates$EtoshaPan
sample_by_individuals(eto.incidence, fraction = 0.1)

boydorr/sampling documentation built on May 23, 2019, 1:45 p.m.