code: public static int[] sliceByTime(CSTable table, int timeCol, Date start, Date end) {
          if (end.before(start)) {
              throw new IllegalArgumentException("end<start");
          }
          if (timeCol < 0) {
              throw new IllegalArgumentException("timeCol :" + timeCol);
          }
          int s = -1;
          int e = -1;
          int i = -1;
          for (String[] col : table.rows()) {
              i++;
              Date d = Conversions.convert(col[timeCol], Date.class);
              if (s == -1 && (start.before(d) || start.equals(d))) {
                  s = i;
              }
              if (e == -1 && (end.before(d) || end.equals(d))) {
                  e = i;
                  break;
              }
          }
          return new int[]{s, e};
      }
docs: Get a slice of rows out of the table matching the time window
  
  @param table
  @param timeCol
  @param start
  @param end
  @return the first and last row that matches the time window start->end