frame_of_all_cells_traversed_per_fish: Dataframe of Cells Traversed for Each Fish

In mrguyperson/predpackplus: Evaluate Piscivore Predation in the Sacramento River

Description

Creates a dataframe of "paths" for each fish to "travel". A number of cells equal to path_length is randomly selected for each fish and becomes that fish's travel path.

Usage

frame_of_all_cells_traversed_per_fish(
  number_of_fish,
  enc_prob_vector,
  path_length
)

Arguments

number_of_fish	number (pos integer) of prey fish desired; should be the same as that for the prey_fish_lengths() function
enc_prob_vector	vector of all encounter probabilities calculated for each cell; see calc_enc_probs()
path_length	number of cells traversed; determined by calculate_path_length()

Value

a dataframe of encounter probabilities for each fish

Note

this function can be parallelized; e.g., by setting plan(multisession)

Examples

pred_pos <- get_pred_positions()
raster <- create_stream_raster_frame(pred_pos)
enc_prob_frame <- calc_enc_probs(raster)
enc_prob_vector <- enc_prob_frame %>% dplyr::pull(enc_prob)
path_length = calculate_path_length()
frame_of_all_cells_traversed_per_fish(number_of_fish = 10,
                                      enc_prob_vector = enc_prob_vector,
                                      path_length = path_length)

mrguyperson/predpackplus documentation built on Dec. 21, 2021, 10:08 p.m.