varbootstrap: Variance estimation via bootstrap over transects

In DistanceDevelopment/densgrad: Distance sampling in presence of animal gradients

Variance estimation via bootstrap over transects

Description

Variance estimation via bootstrap over transects

Usage

varbootstrap(keyfn, survey, gpsdata, disttrunc = 150,
  gradientmaxdist = 100, Nboot, alpha = 0.05, plotit = TRUE,
  conversion = 10000)

Arguments

keyfn	key function of detection function (HN or HR)
survey	distance sampling survey data frame
gpsdata	animal location data frame from telemetry
disttrunc	truncation distance for distance sampling component
gradientmaxdist	maximum distance from transect of telemetry data
Nboot	number of bootstrap replicates
alpha	Type I error rate for computing CI bounds
plotit	logical indicating whether to produce histogram of bootstrap estimates
conversion	conversion factor to get density units reported

Value

parameter estimates of all replicates and upper and lower confidence interval bounds on individual density estimates

DistanceDevelopment/densgrad documentation built on April 23, 2024, 4:11 p.m.