| emuRsegs {emuR} | R Documentation |
emuR segment list
Description
An emuR segment list is a list of segment descriptors. Each segment
descriptor describes a sequence of annotation elements. The list is
usually a result of an emuDB query using function query.
Format
Attributed data.frame, one row per segment descriptor.
Data frame columns are:
labels: sequenced labels of segment concatenated by '->'
start: onset time in milliseconds
end: offset time in milliseconds
session: session name
bundle: bundle name
level: level name
type: type of "segment" row: 'ITEM': symbolic item, 'EVENT': event item, 'SEGMENT': segment
Additional hidden columns:
utts: utterance name (for compatibility to emusegs class)
db_uuid: UUID of emuDB
startItemID: item ID of first element of sequence
endItemID: item ID of last element of sequence
sampleStart: start sample position
sampleEnd: end sample position
sampleRate: sample rate
Attributes:
database: name of emuDB
query: Query string
type: type ('segment' or 'event') (for compatibility to emusegs class)
Details
Each row shows the annotation label sequence, the start and end position
in time, session and bundle names, level name and type.
Additionally the row contains the UUID of the emuDB, the ID's of start
and end elements and the corresponding start and end position as sample
count and the sample rate. These columns are not printed by default.
The print method of emuRsegs hides them. To print all columns of a segment
list object use the print method of data.frame.
For example to print all columns of an emuRsegs segmentlist sl type:
print.data.frame(sl)
Though the segment descriptors have references to the annotations, the label
and sample/time position information is not updated if any of them change. The
values of the segment list may get invalid if the the database is modified.
A segment may consist only of one single element, in this case start and end ID are equal.
An emuR segment list is the default result of query and can
be used to get track data using get_trackdata.
The emuRsegs class inherits emusegs and hence data.frame