Extract or replace covariates
covariates(object, ...)
covariates(object) <- valuecovariates(object) returns the dataframe of covariates associated with
object. covariates(object) may be NULL.
Individual covariates are stored in the `covariates' attribute of a
capthist object.
Covariates used for modelling density are stored in the `covariates'
attribute of a mask object.
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
timevaryingcov attribute.
an object of class traps, popn, capthist, or mask
a dataframe of covariates
other arguments (not used)
For replacement, the number of rows of value must match exactly the number of rows in object.
timevaryingcov
## detector covariates
temptrap <- make.grid(nx = 6, ny = 8)
covariates (temptrap) <- data.frame(halfnhalf =
factor(rep(c("left","right"),c(24,24))) )
summary(covariates(temptrap))
Run the code above in your browser using DataLab