Bayesian priors - Two Source Trophic Position

Create priors for two source trophic position model derived from Post 2002.

Usage

two_source_priors(bp = FALSE)

Arguments

bp

logical value that controls whether informed priors are supplied to the model for both \(\delta^{15}\)N and \(\delta^{15}\)C baselines. Default is FALSE meaning the model will use uninformed priors, however, the supplied data.frame needs values for both \(\delta^{15}\)N and \(\delta^{15}\)C baseline (c1, c2, n1, and n2).

Value

returns priors for two source model to be used in a brms() call.

See also

two_source_model() and brms::brms()

Examples

two_source_priors()
#>                        prior class coef group resp dpar nlpar    lb       ub
#>                   beta(a, b)     b            d13c      alpha     0        1
#>                   beta(a, b)     b            d15n      alpha     0        1
#>         normal(dn, dn_sigma)     b            d15n         dn  <NA>     <NA>
#>        uniform(tp_lb, tp_ub)     b            d15n         tp tp_lb    tp_ub
#>  uniform(sigma_lb, sigma_ub) sigma            d13c             <NA> sigma_ub
#>  uniform(sigma_lb, sigma_ub) sigma            d15n             <NA> sigma_ub
#>  source
#>    user
#>    user
#>    user
#>    user
#>    user
#>    user