# Usage: awk -v column={column_number} -v array={array} -f filter_results.awk input_file

# column_number is the column to filter
# array is a comma-separated string with one or more entries

# fields: chromosome, start, end, experiment_ID, TF_name, JASPAR_matrix_ID, score, strand

# field separator: \t

BEGIN {

  entries[0] = ""
  split(array, entries, ",")

}

{
  if (length(array) == 1) {
    if (toupper($(column)) == toupper(array)) {
      print
    }
  }
  if (length(array) > 1) {
    for (i = 1; i <= length(array); i++) {
      if (toupper($(column)) == toupper(entries[i])) {
        print
      }
    }
  }
}