Add a virtual track to the browser — browser_add

Adds a virtual track definition to the browser configuration. Expression handling is inferred from the provided fields: if src/func are present, expression wraps the created vtrack during extraction; otherwise, expression defines a pure expression vtrack.

Usage

browser_add_vtrack(
  browser,
  name,
  src = NULL,
  func = "avg",
  vtype = NULL,
  expr = NULL,
  expression = NULL,
  sshift = NULL,
  eshift = NULL,
  dim = NULL,
  ...
)

Arguments

browser: Browser object
name: Name for the virtual track
src: Source track name (for standard vtracks)
func: Aggregation function (default "avg"). Common values: "avg", "sum", "min", "max"
vtype: Vtrack type: "standard", "expr", "sequence", "intervals". Usually inferred automatically.
expr: Deprecated alias for expression
expression: Track expression. If src/func are provided, this wraps the created vtrack during extraction (e.g. pmax(vtrack_name, 0)). If no src or func are provided, it defines a pure expression vtrack (e.g. log2(1 + trackname)).
sshift: Start shift in bp
eshift: End shift in bp
dim: Dimension for 2D tracks
...: Additional vtrack parameters

Value

Updated browser object

Examples

if (FALSE) { # \dontrun{
browser <- browser_create() %>%
    browser_add_vtrack("ctcf_log2", expression = "log2(1 + chipseq.ctcf)") %>%
    browser_add_vtrack("my_signal", src = "some.track", func = "avg") %>%
    browser_add_panel(name = "signal", tracks = c("ctcf_log2", "my_signal"))
} # }