importPEBamFiles: A function to import paired end bam files as GRanges

In VplotR: Set of tools to make V-plots and compute footprint profiles

Description

This function takes bam file paths and read them into GRanges objects. Note: Can be quite lengthy for .bam files with 5+ millions fragments.

Usage

importPEBamFiles(
  files,
  genome = NULL,
  where = NULL,
  max_insert_size = 1000,
  shift_ATAC_fragments = FALSE,
  cores = 10,
  verbose = TRUE
)

Arguments

files	character vector, each element of the vector is the path of an individual .bam file.
genome	character, genome ID (e.g. sacCer3, ce11, dm6, danRer10, mm10 or hg38).
where	GRanges, only import the fragments mapping to the input GRanges (can fasten the import process a lot).
max_insert_size	Integer, filter out fragments larger than this size.
shift_ATAC_fragments	Boolean, if the fragments come from ATAC-seq, one might want to shift the extremities by +5 / -4 bp.
cores	Integer, number of cores to use when indexing bam files
verbose	Boolean

Value

A GRanges object containing fragments from the input .bam file.

Examples

bamfile <- system.file("extdata", "ex1.bam", package = "Rsamtools")
fragments <- importPEBamFiles(
    bamfile, 
    shift_ATAC_fragments = TRUE
)
fragments

VplotR documentation built on Nov. 8, 2020, 7:50 p.m.