admtools (version 0.4.0)

anchor: anchor age-depth model

Description

anchors a deterministic age-depth model (adm object) at a tie point that is associated with uncertainty.

Usage

anchor(x, index = "last", t_anchor = NULL, n = 1000L)

Value

a collection of age-depth models (a multiadm object)

Arguments

x

age-depth model

index

"last" or "first", or an integer (marked by L, e.g. 2L), specifying at which tie point the age-depth model will be anchored. If i is passed as integer, the i-th tie point is anchored.

t_anchor

time at which the adm is anchored. must be a function that takes no arguments and returns the timing of the tie point. see example or vignettes for details

n

integer, number of samples drawn from the tie point

Examples

t_anchor = function() rnorm(1) # normally distributed uncertainty
x = tp_to_adm(t = c(1,2, 3), h = c(2,3, 4)) # simple age-depth model
m = anchor(x, index = "last", t_anchor = t_anchor, n = 100) # anchor age-depth model
plot(m)
m = anchor(x, index = 2L, t_anchor = t_anchor, n = 100)
plot(m)