Get upstream intervals from a GRanges object.
Value
A GRanges object with intervals of width specified by width upstream of the start position of the gr input GRanges object.
Examples
gr <- data.frame(seqnames = "chr1",
strand = c("+", "-"),
start = c(42001, 67001),
width = c(1000, 1000),
gene = c("A", "B")) |>
plyranges::as_granges()
gr
#> GRanges object with 2 ranges and 1 metadata column:
#> seqnames ranges strand | gene
#> <Rle> <IRanges> <Rle> | <character>
#> [1] chr1 42001-43000 + | A
#> [2] chr1 67001-68000 - | B
#> -------
#> seqinfo: 1 sequence from an unspecified genome; no seqlengths
get_upstream(gr)
#> GRanges object with 2 ranges and 2 metadata columns:
#> seqnames ranges strand | gene ranges_original
#> <Rle> <IRanges> <Rle> | <character> <IRanges>
#> [1] chr1 37001-42000 + | A 42001-43000
#> [2] chr1 67999-72998 - | B 67001-68000
#> -------
#> seqinfo: 1 sequence from an unspecified genome; no seqlengths