random_steps: Generate Random Steps

In amt: Animal Movement Tools

Generate Random Steps

Description

Function to generate a given number of random steps for each observed step.

Usage

random_steps(x, ...)

## S3 method for class 'numeric'
random_steps(
  x,
  n_control = 10,
  angle = 0,
  rand_sl = random_numbers(make_exp_distr(), n = 1e+05),
  rand_ta = random_numbers(make_unif_distr(), n = 1e+05),
  ...
)

## S3 method for class 'steps_xy'
random_steps(
  x,
  n_control = 10,
  sl_distr = fit_distr(x$sl_, "gamma"),
  ta_distr = fit_distr(x$ta_, "vonmises"),
  rand_sl = random_numbers(sl_distr, n = 1e+05),
  rand_ta = random_numbers(ta_distr, n = 1e+05),
  include_observed = TRUE,
  start_id = 1,
  ...
)

## S3 method for class 'bursted_steps_xyt'
random_steps(
  x,
  n_control = 10,
  sl_distr = fit_distr(x$sl_, "gamma"),
  ta_distr = fit_distr(x$ta_, "vonmises"),
  rand_sl = random_numbers(sl_distr, n = 1e+05),
  rand_ta = random_numbers(ta_distr, n = 1e+05),
  include_observed = TRUE,
  ...
)

Arguments

x	Steps.
...	Further arguments, none implemented.
n_control	⁠[integer(1)=10]{>1}⁠ The number of control steps paired with each observed step.
angle	⁠[numeric(1) = 0]{-pi < rel_angle < pi}⁠ Angle for the first step.
rand_sl	⁠[numeric]⁠ Numeric vector with random step lengths an animal can make. This will usually be random numbers drawn from a suitable distribution (e.g., gamma or exponential).
rand_ta	⁠[numeric]⁠ Numeric vector with relative turning angles an animal can make. This will usually be random numbers drawn from a suitable distribution (e.g., von Mises or uniform).
sl_distr	⁠[amt_distr]⁠ The step-length distribution.
ta_distr	⁠[amt_distr]⁠ The turn-angle distribution.
include_observed	⁠[logical(1) = TRUE]⁠ Indicates if observed steps are to be included in the result.
start_id	integer Index where the numbering for step ids start.

Value

A tibble of class random_steps.

amt documentation built on March 31, 2023, 5:29 p.m.