emr_track.attr.export {naryn}

Returns attributes values of tracks

Description

Returns attributes values of tracks.

Usage

emr_track.attr.export(track = NULL, attr = NULL, include_missing = FALSE)

Arguments

track

a vector of track names or 'NULL'

attr

a vector of attribute names or 'NULL'

include_missing

when TRUE - adds a row for tracks which do not have the 'attr' with NA, or tracks which do not exist. Otherwise tracks without an attribute would be omitted from the data frame, and an error would be thrown for tracks which do not exist.

Details

This function returns a data frame that contains attributes values of one or more tracks. The data frame is constituted of 3 columns named 'track', 'attr' and 'value'.

'track' parameter is optionally used to retrieve only the attributes of the specific track(s). If 'NULL', attributes of all the tracks are returned.

Likewise 'attr' allows to retrieve only specifically named attributes.

If both 'track' and 'attr' are used, the attributes that fulfill both of the conditions are returned

Overriding a track also overrides it's track attributes, the attributes will persist when the track is no longer overridden.

Value

A data frame containing attributes values of tracks.

See Also

emr_track.attr.get, emr_track.attr.set

Examples

emr_db.init_examples()
emr_track.attr.export()
emr_track.attr.set("sparse_track", "gender", "female")
emr_track.attr.set("sparse_track", "tag", "")
emr_track.attr.set("dense_track", "gender", "male")
emr_track.attr.export()
emr_track.attr.export(track = "sparse_track")
emr_track.attr.export(attr = "gender")
emr_track.attr.export(track = "sparse_track", attr = "gender")