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Extract the observation distances (i.e., responses for an Rdistance model) from an Rdistance model frame.
distances(ml, na.rm = TRUE, ...)A vector containing observation distances contained in the Rdistance model frame.
Either a Rdistance 'model frame' or an Rdistance
'fitted object'. Both are of class "dfunc".
Rdistance 'model frames' are lists containing components
necessary to estimate a distance function, but no estimates.
Rdistance 'model frames' are typically
produced by calls to parseModel.
Rdistance 'fitted objects'
are typically produced by calls to dfuncEstim.
'Fitted objects' are 'model frames'
with additional components such as the parameters estimates,
log likelihood value, convergence information, and the variance-
covariance matrix of the parameters.
Whether to include or exclude missing distance values.
In ml, the model list containing the model frame, missing
values of the response (distance) are potentially present for two
reasons: (1) they are outside the strip w.lo to w.hi, and (2) they
are missing because the crew did not get a distance for that observation.
Ignored
data(sparrowDf)
sparrowModel <- parseModel( sparrowDf, dist ~ observer )
stats::model.response(sparrowModel$mf)
distances(sparrowModel) # same, but future-proof
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