update_speed_param: Simulate speed parameters.

In a-parton/CTStepTurn: Fitting the continuous-time step-and-turn movement model

Description

update_speed_param returns a conditional MH proposal (with acceptance probability) of the speed parameters.

Usage

update_speed_param(fixed_constant, curr_move_params, behav_params, refined_path)

Arguments

fixed_constant	List with components: pert_sd Vector, perturbation standard deviations for the speed parameter proposals. num_states Numeric, number of behavioural states. indep_step Boolean, True if independent step model, False if correlated step model. num_speed_param Numeric, number of speed parameters. q.bearings Vector, index positions within curr_move_params relating to bearing parameters. q.speed_mean Vector, index positions within move_params relating to speed mean parameters. q.speed_corr Vector, index positions within move_params relating to speed correlation parameters. q.speed_var (Will only apply if indep_step is False) Vector, index positions within move_params relating to speed variance parameters. q.obs_error Vector, index positions within curr_move_params relating to observation error parameters.
curr_move_params	Vector of movement parameters (as turn_var_1, turn_var_2, mean_speed_1, .., speed_var_2).
behav_params	List with components: lambda Vector (length num_states) of switching rates. q Matrix (square size num_states with NA diagonal elements) of switching probabilities. Note: row = from, column = to.
refined_path	List with components: time_diffs Vector, differences in the refined time scale. behavs Vector, refined behavioural/state sequence. steps Vector, refined step process.

Value

List with the components:

accept_prob

Numeric, probability of accepting the MH proposal.

prop_speed_params

Vector, proposed speed parameters.

See Also

Other Speed parameters: calc_cond_step_dist, calc_markov_steady_state, calc_step_lik

a-parton/CTStepTurn documentation built on May 14, 2019, 4:17 p.m.