sample_met: Sample environments from a target population

In FieldSimR: Simulation of Plot Errors and Phenotypes in Plant Breeding Field Trials

Sample environments from a target population

Description

Creates a list of environments sampled from a population with user-defined sample size.

Usage

sample_met(
  ntraits = 1,
  nenvs = 1000,
  nsamples = 10,
  sample.size = 20,
  replace = TRUE,
  cov.mat = NULL
)

Arguments

ntraits	A scalar defining the number of traits.
nenvs	A scalar defining the number of environments in the target population.
nsamples	A scalar defining the number of samples to be taken.
sample.size	A vector defining the number of environments in each sample. When only one value is specified, all samples will be assigned the same number.
replace	When TRUE (default), samples are taken with replacement. Ignored when nsamples = 1.
cov.mat	An optional matrix of environmental covariates for one or more traits. When supplied, the covariates are sampled and printed.

Value

A list with elements given by the sample of environments taken from the target population. When cov.mat is supplied, additional entries are given containing the sampled environmental covariates for each trait.

Examples

# Sample environments from a target population of 1000, with each sample containing 20 environments.
cov_ls <- sample_met(
  nenvs = 1000,
  nsamples = 10,
  sample.size = 20,
  replace = TRUE
)

FieldSimR documentation built on Sept. 11, 2024, 6:39 p.m.