Double platform data collected in a line transect survey of golf tees by 2 observers at St. Andrews. Field sex was actually colour of the golf tee: 0 - green; 1 - yellow. Exposure was either low (0) or high(1) depending on height of tee above the ground. size was the number of tees in an observed cluster.
A list of 4 dataframes, with the list elements named: book.tee.dataframe, book.tee.region, book.tee.samples and book.tee.obs.
book.tee.dataframe is the distance sampling data
dataframe. Used in the call to fit the detection function in ddf.
Contains the following columns:
numeric object id
factor representing observer 1 or 2
numeric 1 if the animal was detected 0 otherwise
numeric value for the distance the animal was detected
numeric value for the group size
numeric value for sex of animal
numeric value for exposure level 0 or 1
book.tee.region: is the region table dataframe. Used to
supply the strata areas to the dht function. Contains the following
columns:
factor giving the strata labels
numeric value giving the strata areas
book.tee.samples is the samples table dataframe to match
the transect ids to the region ids and supply the effort. Used in the
dht function. Contains the following columns:
numeric giving the sample / transect labels
factor giving the strata labels
numeric value giving the sample / transect lengths
book.tee.obs is the observations table dataframe to match
the object ids in the distance data to the transect labels. Used in the
dht function. Contains the following columns:
numeric value object id
factor giving the strata labels
numeric giving the sample / transect labels