Man pages for Rdistance
Density and Abundance from Distance-Sampling Surveys

abundEstimDistance Sampling Abundance Estimates
AIC.dfuncAIC-related fit statistics for detection functions
autoDistSampAutomated classical distance analysis
bcCIBias corrected bootstraps
bootstrapPerform bootstrap iterations
bspline.expansionB-spline expansion terms
checkNEvalPtsCheck number of numeric integration intervals
checkUnitsCheck for the presence of units
coef.dfuncCoefficients of an estimated detection function
colorizeAdd color to result if terminal accepts it
cosine.expansionCosine expansion terms
dE.multiEstimate multiple-observer line-transect distance functions
dE.singleEstimate single-observer line-transect distance function
dfuncEstimEstimate a distance-based detection function
dfuncEstimErrMessagedfuncEstim error messages
differentiableLikelihoodsDifferentiable likelihoods in Rdistance
distancesObservation distances
EDREffective Detection Radius (EDR) for point transects
effectiveDistanceEffective sampling distances
effortEffort information
errDataUnkUnknown error message
estimateNAbundance point estimates
ESWEffective Strip Width (ESW) for line transects
expansionTermsDistance function expansion terms
Gamma.likeGamma distance function
GammaModesModes of the Gamma distribution
GammaReparamReparameterise Gamma parameters for use in dgamma
Gamma.start.limitsGamma.start.limits - Start and limit values for Gamma...
getNCoresSet number of cores
groupSizesGroup Sizes
gxEstimEstimate g(0) or g(x)
halfnorm.likeHalf-normal distance function
halfnorm.start.limitsStart and limit values for halfnorm distance function
hazrate.likeHazard rate likelihood
hazrate.start.limitsStart and limit values for hazrate distance function
hermite.expansionHermite expansion factors
HookeJeeves'nlminb' optimizer
insertOneStepBreaksInsert oneStep Likelihood breaks
integrateDfuncsIntegration of distance functions
integrateGammaLinesIntegrate Gamma line surveys
integrateHalfnormLinesIntegrate Half-normal line surveys
integrateHalfnormPointsIntegrate Half-normal Point transects
integrateHazrateLinesIntegrate Hazard-rate line survey distance functions
integrateKeyCompute and print distance function integration
integrateNegexpLinesIntegrate Negative exponential
integrateNegexpPointsIntegrate Negative exponential point surveys
integrateNumericNumeric Integration
integrateOneStepLinesIntegrate Line-transect One-step function
integrateOneStepNumericNumeric Integration of One-step Function
integrateOneStepPointsIntegrate Point-survey One-step function
intercept.onlyDetect intercept-only distance function
is.pointsTests for point surveys
is.RdistDfCheck RdistDf data frames
is.smoothedTests for smoothed distance functions
is.UnitlessTest whether object is unitless
likeParamNamesLikelihood parameter names
lines.dfunclines.dfunc - Line plotting method for distance functions
maximize.gFind coordinate of function maximum
mlEstimatesDistance function maximum likelihood estimates
model.matrix.dfuncRdistance model matrix
nCovarsNumber of covariates
negexp.likeNegative exponential likelihood
negexp.start.limitsStart and limit values for negexp distance function
nLLNegative log likelihood of distances
Nlminb'nlminb' optimizer
observationTypeType of observations
oneBsIterCalculations for one bootstrap iteration
oneStep.likeMixture of two uniforms likelihood
oneStep.start.limitsoneStep likelihood start and limit values
Optim'optim' optimizer
parseModelParse Rdistance model
perpDistsCompute off-transect distances from sighting distances and...
plot.dfuncPlot method for distance (detection) functions
plot.dfunc.paraPlot parametric distance functions
predDensityDensity on transects
predDfuncsPredict distance functions
predict.dfuncPredict distance functions
predLikelihoodDistance function values at observations
print.abundPrint abundance estimates
print.dfuncPrint method for distance function object
RdistanceControlsRdistance optimization control parameters.
Rdistance-packageRdistance - Distance Sampling Analyses for Abundance...
RdistDfConstruct Rdistance nested data frames
secondDerivNumeric second derivatives
simple.expansionSimple polynomial expansion factors
simpsonCoefsSimpson numerical integration coefficients
sine.expansionSine expansion terms
sparrowDetectionDataBrewer's Sparrow detection data
sparrowDfBrewer's Sparrow detection data frame in Rdistance >4.0.0...
sparrowDfuncObserverBrewer's Sparrow detection function
sparrowSiteDataBrewer's Sparrow site data
startLimitsDistance function starting values and limits
summary.abundSummarize abundance estimates
summary.dfuncSummarize a distance function object
summary.rowwise_dfSummary method for Rdistance data frames
thrasherDetectionDataSage Thrasher detection data
thrasherDfSage Thrasher detection data frame in Rdistance >4.0.0 format
thrasherSiteDataSage Thrasher site data.
transectTypeType of transects
unitHelpersUnit assignment helpers
unnestUnnest an RdistDf data frame
varcovarEstimEstimate variance-covariance
Rdistance documentation built on Jan. 10, 2026, 1:07 a.m.