A simple way to fit detection functions to distance sampling data and calculate abundance/density for biological populations.

Documentation for package ‘Distance’ version 0.7.1

create.bins	Create bins from a set of binned distances and a set of cutpoints.
ds	Fit detection functions and calculate abundance from line or point transect data
plot.dsmodel	Plot a fitted detection function
print.dsmodel	Simple pretty printer for distance sampling analyses
print.summary.dsmodel	Print summary of distance detection function model object
summary.dsmodel	Summary of distance sampling analysis