Package: SightabilityModel 1.5.5

Schwarz Carl James

SightabilityModel: Wildlife Sightability Modeling

Uses logistic regression to model the probability of detection as a function of covariates. This model is then used with observational survey data to estimate population size, while accounting for uncertain detection. See Steinhorst and Samuel (1989).

Authors:Fieberg John [aut], Schwarz Carl James [aut, cre]

SightabilityModel_1.5.5.tar.gz
SightabilityModel_1.5.5.zip(r-4.7)SightabilityModel_1.5.5.zip(r-4.6)SightabilityModel_1.5.5.zip(r-4.5)
SightabilityModel_1.5.5.tgz(r-4.6-any)SightabilityModel_1.5.5.tgz(r-4.5-any)
SightabilityModel_1.5.5.tar.gz(r-4.7-any)SightabilityModel_1.5.5.tar.gz(r-4.6-any)
SightabilityModel_1.5.5.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
card.svg |card.png
SightabilityModel/json (API)
NEWS

# Install 'SightabilityModel' in R:
install.packages('SightabilityModel', repos = c('https://jfieberg.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/jfieberg/sightabilitymodel/issues

Datasets:
  • exp.m - Experimental (test trials) data set used to estimate detection probabilities for moose in MN
  • g.fit - Mountain Goat Sightability Model Information
  • gdat - Mountain Goat Survey Data from Olympic National park
  • obs.m - MN moose survey data
  • sampinfo.m - Data set containing sampling information for observation survey of moose in MN

On CRAN:

Conda:

4.98 score 1 stars 24 scripts 187 downloads 17 exports 27 dependencies

Last updated from:a6a3eb3101. Checks:9 OK. Indexed: yes.

TargetResultTimeFilesSyslog
linux-devel-x86_64OK170
source / vignettesOK264
linux-release-x86_64OK177
macos-release-arm64OK144
macos-oldrel-arm64OK201
windows-develOK114
windows-releaseOK110
windows-oldrelOK130
wasm-releaseOK123

Exports:check.sightability.model.argscompute.detect.probcompute.SCFcovthetaMoosePopRMoosePopR_DomStratMoosePopR_DomStrat_bootrepSight.EstSight.Est.RatioSightabilityPopRSightabilityPopR_DomStratSS.estSS.est.Ratiovardiffvarlog.lamWong.estWong.est.Ratio

Dependencies:cliDBIexpmformula.toolsgenericsgluelatticelifecyclemagrittrMatrixminqamitoolsmsmmvtnormnumDerivoperator.toolspillarpkgconfigplyrRcppRcppArmadillorlangsurveysurvivaltibbleutf8vctrs

a-Estimating Population Abundance Using Sightability Models: R SightabilityModel Package

Rendered froma-SightabilityModel.Rnwusingutils::Sweaveon Jun 04 2026.

Last update: 2022-05-18
Started: 2022-05-18

b-Implementing the Ratio Estimator

Rendered fromb-RatioEstimator.pdf.asisusingR.rsp::asison Jun 04 2026.

Last update: 2022-05-18
Started: 2022-05-18

c-MoosePopR and SightabilityPopR Demonstration

Carl James Schwarz

Rendered fromc-MoosePopR-SightabilityPopR-Demo.Rmdusingknitr::rmarkdownon Jun 04 2026.

Last update: 2023-02-17
Started: 2022-05-18

d-DomainStratification-method-of-Heard-2008

Rendered fromd-DomainStratification-method-of-Heard-2008.html.asisusingR.rsp::asison Jun 04 2026.

Last update: 2022-05-18
Started: 2022-05-18

Readme and manuals

Help Manual

Help pageTopics
Wildlife Sightability ModelingSightabilityModel-package SightabilityModel
Check the sightability model arguments for consistencycheck.sightability.model.args
Compute the detection probability given a sightability modelcompute.detect.prob
Compute the sightability correction factor given a sightability and covariatescompute.SCF
Estimates var/cov matrix of inflation factors (1/prob detection) using a non-parametric bootstrap.covtheta
Experimental (test trials) data set used to estimate detection probabilities for moose in MNexp.m
Mountain Goat Sightability Model Informationg.fit
Mountain Goat Survey Data from Olympic National parkgdat
R function that gives the same functionality as the MoosePop program.MoosePopR
Classical and Domain Stratification using MoosePopR()MoosePopR_DomStrat
Generate a bootstrap replicate of data for call to MoosePopR_DomStrat()MoosePopR_DomStrat_bootrep
MN moose survey dataobs.m
Print method for sightability estimatorsprint.sightest print.sightest_ratio
Data set containing sampling information for observation survey of moose in MNsampinfo.m
Sightability Model EstimatorSight.Est
Sightability Model Estimator - Ratio of variablesSight.Est.Ratio
R function that interfaces with the SightabilityModel package and gives similar functionality as the AerialSurvey programSightabilityPopR
Classical and Domain Stratification using SightabilityPopR()SightabilityPopR_DomStrat
Sightability estimate with variance components estimator from Steinhorst and Samuel (1989) and Samuel et al. (1992).SS.est
Sightability estimate or ratio with variance components estimator from Steinhorst and Samuel (1989) and Samuel et al. (1992). This is merely a stub and has not been implemented.SS.est.Ratio
Summarize sightability estimatorsummary.sightest summary.sightest_ratio
Function to estimate the variance of the difference between two population estimatesvardiff
Calculates the variance of the log rate of change between 2 population estimates that rely on the same sightability model.varlog.lam
Sightability estimate with variance components estimator from Wong (1996)Wong.est
Sightability estimate of ratio with variance components estimator from Wong (1996)Wong.est.Ratio