Help System (web edition)

The line labels for the names of variables and data itself can
be given explicitly as follows:

  11 *DATA ABC1,13,16,12
  12 *   X   Y   test1
  13 * 1.2   5   -4.56
  14 * 3.4  11    3.52
  15 * 2.0   9    2
  16 * 1.7   4    4.6
  17 * (this line can contain any text)

Here DATA ABC1,13,16,12 indicates that data values are on lines 13-16
and labels on line 12.
Thus it is not necessary to have the DATA line, labels and data values
on consecutive lines. Also symbolic labels may be used for lines.
Missing values are indicated by a '-'.
  D = More information on data representation