Extract or replace covariates
an object of class
a dataframe of covariates
other arguments (not used)
For replacement, the number of rows of
value must match exactly the number of rows in
covariates(object) returns the dataframe of covariates associated with
covariates(object) may be NULL.
Individual covariates are stored in the ‘covariates’ attribute of a
Covariates used for modelling density are stored in the ‘covariates’
attribute of a
Detector covariates may vary between sampling occasions. In this case,
columns in the detector covariates data.frame are associated with
particular times; the matching is controlled by the
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