#' Required for remsD bootstrapping
#'
#' Resamples camera trap data to calculate variance for Random Encounter Model density estimates. Note that tm and v must be the same across all sites. If this is not the case, split your data before bootstrapping and run the function on each sub-group. Called by remsD. Calls bsD.
#' @param x bsD resampled data
#' @param tm (numeric) The total number of hours all cameras were left in-situ at a focal site
#' @param v (numeric) The distance travelled by the focal species in 24 hours, in kilometres
#' @param nboots (numeric) The number of bootstrap iterations
#' @export
#' @examples
#' ## Define the number of bootstrapping iterations and apply boot_sd to the data:
#' tm <- 3600
#' v <- 0.85
#' nboots <- 1000
#'
#' grpDat <- split_dat(hDat)
#' remsD <- lapply(grpDat, boot_sd, tm, v, nboots)
#' remsSD <- lapply(remsD, sd)
#' remsSD
#'
#' @importFrom stats quantile sd
boot_sd <- function(x, tm, v, nboots){
d <- replicate(nboots, bsD(x, tm, v))
return(d)
}
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