Get first exon per GRangesList group

Description

grl must be sorted, call ORFik:::sortPerGroup if needed

Usage

firstExonPerGroup(grl)

Arguments

Value

a GRangesList of the first exon per group

Examples

gr_plus <- GRanges(seqnames = c("chr1", "chr1"),
                   ranges = IRanges(c(7, 14), width = 3),
                   strand = c("+", "+"))
gr_minus <- GRanges(seqnames = c("chr2", "chr2"),
                    ranges = IRanges(c(4, 1), c(9, 3)),
                    strand = c("-", "-"))
grl <- GRangesList(tx1 = gr_plus, tx2 = gr_minus)
firstExonPerGroup(grl)