TrackDb-class {rtracklayer} | R Documentation

## Track Databases

### Description

The `TrackDb` class is an abstraction around a database of tracks. Implementations include `BrowserSession` derivatives and `QuickloadGenome`. Here, a track is defined as an interval dataset.

### Accessor Methods

Every implementation should support these methods:

  `length(x)`: number of tracks

  `names(x)`, `trackNames(x)`: names of the tracks

  `mcols(x)`: merged metadata on the tracks

  `track(x, name)`, `x$name`, `x[[name]]`: get the track called `name`

  `track(x, name) <- value`, `x$name <- value`, `x[[name]] <- value`: store the track `value` under `name`. Different implementations will support different types for `value`. Generally, an interval data structure like `GenomicRanges`.

### Author(s)

Michael Lawrence

[Package rtracklayer version 1.42.2 Index]