count_transcripts: determine how many transcripts are annotated in a FASTA or...
In alyssafrazee/polyester: Simulate RNA-seq reads

determine how many transcripts are annotated in a FASTA or GTF file

count_transcripts(
  f,
  fasta = TRUE,
  identifier = "transcript_id",
  attrsep = "; "
)

`f`	character, path to a file in FASTA or GTF format
`fasta`	TRUE if `f` is a fasta file; FALSE if `f` is a GTF file
`identifier`	if `f` is a GTF file, how are transcripts identified in the attributes field (9th column) of the file? Default `transcript_id`.
`attrsep`	if `f` is a GTF file, how are attributes separated in the attributes field (9th column) of the file? Default "; ".