model absence of environmental gradients

Models a constant gradient with value 1. Mainly used as default input to last_occ and range_offset.

Usage

trivial_gradient(x)

Arguments

x

time/stratigraphic position at which the gradient is determined

Value

A vector of the same length as x with all entries replaced by 1.

See also

last_occ(), range_offset(), trivial_niche(), and apply_niche()

Examples

x = p3(rate = 10, from = 0, to = 1) # model fossil occurrences
# apply trivial niche model
y = apply_niche(x, niche_def = trivial_niche, gc = trivial_gradient)
all(x == y) # true, no fossils were removed
#> [1] TRUE