Retrieve the size of the DataFrameAnnotationTrack

Retrieve the size of the DataFrameAnnotationTrack

Usage

# S4 method for DataFrameAnnotationTrack
trackSize(obj)

Arguments

obj

An object of class UCSCBedAnnotationTrack

Value

The number of elements

Examples

base.loc <- 88883100
tbl <- data.frame(chrom=rep("chr5", 3),
                  start=c(base.loc, base.loc+100, base.loc + 250),
                  end=c(base.loc + 50, base.loc+120, base.loc+290),
                  name=c("a", "b", "c"),
                  score=runif(3),
                  strand=rep("*", 3),
                  stringsAsFactors=FALSE)

track <- DataFrameAnnotationTrack("dataframeTest", tbl)
trackSize(track)
#> [1] 3