The grouping columns of a frame

The frame is grouped by its identity keys and temporal context keys: c(what$keys, when$keys). The index and an anievent's interval are never grouping columns.

Usage

get_keys(data)

Arguments

data

An aniframe.

Value

Character vector of column names.

See also

get_variables()

Examples

af <- example_anipoint(n_obs = 3, n_individuals = 1, n_keypoints = 1)
get_keys(af)
#> [1] "individual" "keypoint"   "session"    "trial"