plot_detection: Distance sampling analysis.

In MathieuGenu/geffaeR: Generic Function for Abundance Estimation with R

Distance sampling analysis.

Description

Adjust a detection function on distance observation for one taxonomic group. It gives the ESW (effective-strip witdth), its standard deviation, a distance object from ds function, and it gives the detection plot of the detection function adjusted.

Usage

plot_detection(distdata, bin = NULL, key = NULL, upper = NULL, is_seabird)

Arguments

distdata	data.frame previously built with prepare_data_obs.
bin	Min and max value of the distance detection and the step between these two.
key	Choice bewtween two key function : "halfnorm" : Half-Normal. "hazard" : hazard-rate.
upper	Maximum value of the distance range of detection estimation.

Value

This function return list with :

1. esw : effective strip width. with confidence interval at 95 percent.

2. esw_cv : coefficient of variation of esw in percent.

3. graph : Barplot of detections depending of distance, with confindence estimated with mcmc chains.

4. distfit : distance object from ds function.

MathieuGenu/geffaeR documentation built on March 23, 2022, 7:50 p.m.