Access and modify the track data. x$name and x$name <- value are
just shortcuts for trackData(x)$name and trackData(x)$name <- value,
respectively.
trackData(x) trackData(x) <- value # S4 method for TnTTrack $(x, name) # S4 method for TnTTrack $(x, name) <- value
| x | A TnTTrack object. |
|---|---|
| value | Replaced value. |
| name | Passed to the inner method for track data. |
trackData on all track types except "CompositeTrack" returns an
object that inherits GRanges class, which means they should behave like a GRanges.
While trackData on "CompositeTrack" returns a list of tracks.
track <- BlockTrack(GRanges("chr1", IRanges(6, 54))) trackData(track) # track data of block track is an object that inherits GRanges.#> RangeTrackData object with 1 range and 3 metadata columns: #> seqnames ranges strand | tooltip color key #> <Rle> <IRanges> <Rle> | <data.frame> <character> <integer> #> [1] chr1 [6, 54] * | blue 1 #> ------- #> seqinfo: 1 sequence from an unspecified genome; no seqlengthsctrack <- merge(track, track) trackData(ctrack) # track data of composite track is a list of tracks#> An object of class "CompositeTrackData" #> [[1]] #> A BlockTrack #> | Label: GRanges("chr1", IRanges(6, 54)) #> | Background: missing, use ‘white’ #> | Height: 30 #> | Data: RangeTrackData object with 1 range and 3 metadata columns: #> | seqnames ranges strand | tooltip color key #> | <Rle> <IRanges> <Rle> | <data.frame> <character> <integer> #> | [1] chr1 [6, 54] * | blue 1 #> | ------- #> | seqinfo: 1 sequence from an unspecified genome; no seqlengths #> #> [[2]] #> A BlockTrack #> | Label: GRanges("chr1", IRanges(6, 54)) #> | Background: missing, use ‘white’ #> | Height: 30 #> | Data: RangeTrackData object with 1 range and 3 metadata columns: #> | seqnames ranges strand | tooltip color key #> | <Rle> <IRanges> <Rle> | <data.frame> <character> <integer> #> | [1] chr1 [6, 54] * | blue 1 #> | ------- #> | seqinfo: 1 sequence from an unspecified genome; no seqlengths #>