code: public static ClassificationDataSet readC(int classification_target, Path path, int lines_to_skip, Set<Integer> cat_cols) throws IOException
      {
          return readC(classification_target, path, DEFAULT_DELIMITER, lines_to_skip, DEFAULT_COMMENT, cat_cols);
      }
docs: Reads in a CSV dataset as a classification dataset. Comments assumed to
  start with the "#" symbol.
  
  @param classification_target the column index (starting from zero) of the
  feature that will be the categorical target value
  @param path the CSV file to read
  @param lines_to_skip the number of lines to skip when reading in the CSV
  (used to skip header information)
  @param cat_cols a set of the indices to treat as categorical features.
  @return the classification dataset from the given CSV file
  @throws IOException