Returns the number of presence rows (nrow(env_occ)) that were
passed to optimize_niche. This is the sample size used
by BIC and is the conventional choice for the
presence-only and weighted families: even though the weighted
likelihood includes a denominator over background points, the
observed quantities being modeled are the \(n_{occ}\) occurrences.
Usage
# S3 method for class 'xnicher'
nobs(object, ...)Examples
# \donttest{
fit <- optimize_niche(env_occ = example_env_occ_2d,
env_m = example_env_m_2d,
num_starts = 5L, likelihood = "weighted")
nobs(fit)
#> [1] 73
# }