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Rdistance (version 1.3.2)

Distance Sampling Analyses

Description

Analysis of distance sampling data collected on line transect surveys. Estimates distance-based detection functions and abundances.

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Install

install.packages('Rdistance')

Monthly Downloads

483

Version

1.3.2

License

GNU General Public License

Issues

21

Pull Requests

0

Stars

9

Forks

3

Maintainer

Trent McDonald

Last Published

July 22nd, 2015

Functions in Rdistance (1.3.2)

sparrow.transects

Example data: sparrow transects
F.maximize.g

F.maximize.g - Finds the coordinate of the maximum of a distance function.
simple.expansion

Calculate simply polynomial expansion for detection function likelihoods.
F.double.obs.prob

F.double.obs.prob - Compute double observer probability of detection. No external covariates allowed.
AIC.dfunc

AICc and related fit statistics for detection function objects
F.dfunc.estim

Estimate a detection function from distance-sampling data.
plot.dfunc

Plot a distance function.
cosine.expansion

Calcululation of cosine expansion for detection function likelihoods.
F.start.limits

F.start.limits - Set starting values and limits for parameters of Rdistance functions.
integration.constant

Compute the integration constance for distance density functions.
F.nLL

F.nLL - Return the negative log likelihood for a set of distance values.
perp.dists

Compute off-transect distances from sighting distances and angles
Rdistance-package

Rdistance - Distance Sampling Analyses for Line Transect Data
uniform.like

Standard likelihood functions for distance analyses.
F.automated.CDA

Automated classical distance analysis.
coef.dfunc

Coefficients of an estimated detection function
F.gx.estim

F.gx.estim - Estimate g(0) or g(x).
sparrow.detections

Example data: sparrow detections
Gamma.like

Gamma likelihood for distance analyses
hermite.expansion

Calcululation of Hermite expansion for detection function likelihoods.
print.abund

Print abundance estimates.
print.dfunc

Print a distance function object.
ESW

Effective Strip Width for estimated detection functions
F.abund.estim

Estimate abundance from distance-sampling data.