Add covariates to a space4time capture history object

Add covariates to a space4time capture history object. If the covariate has missing levels from the indices (a1,a2,j,k,s,t,r,g), then two indicator variables are added. The first is named "ON_" appended to the covariate name, and it is 1 if the covariate has a value for that level, and 0 otherwise. The second is named "OFF_" appended to the covariate name, and it is 0 when the covariate has a value for that level, and 1 otherwise. The covariate is set to 0 for al values it is missing.

Usage

add_covariates(cov_df, s4t_ch)

Arguments

cov_df

a data.frame or list of data.frame's containing the covariates for theta and p a1,a2,j,k,s,t,r,g indices. See details.

s4t_ch

a s4t_ch object.

Value

a s4t_ch object with covariates added

Details

To show how covariates are added or what levels are required for the indices, use extract_covariates().