docs: def create_log2fc_bigwigs(matrix, outdir, args):
      # type: (pd.DataFrame, str, Namespace) -> None
      """Create bigwigs from matrix."""
  
      call("mkdir -p {}".format(outdir), shell=True)
      genome_size_dict = args.chromosome_sizes
  
      outpaths = []
      for bed_file in matrix[args.treatment]:
          outpath = join(outdir, splitext(basename(bed_file))[0] + "_log2fc.bw")
          outpaths.append(outpath)
  
      data = create_log2fc_data(matrix, args)
  
      Parallel(n_jobs=args.number_cores)(delayed(_create_bigwig)(bed_column, outpath, genome_size_dict) for outpath, bed_column in zip(outpaths, data))