The VARIABLES or COLUMNS indicator cards
are used interchangeably to announce the (problem) variables
for the minimization. The user may also give a scaling factor for the
entries in the column.
The syntax for data following this indicator card is given in
Figure 3.9.
Figure 3.9:Possible data cards for VARIABLES or
COLUMNS (row-wise)
The string varbl-name in data field 2 gives the name of the
variable (or column)
under consideration. This name may be up to ten
characters long excepting that the name `SCALE'
is not allowed.
If data field 1 holds the character X or Z, an array
definition is to be made. In this case, the expanded array name
of the variables (or columns) must be valid and the integer indices
must have been defined in a parameter assignment (see
Section 3.2.3).
The string $$$$$$$$$$ in data field 3 is used for four
purposes.
If the string is empty, the card is just defining the name
of a problem variable.
Such a card
must be inserted for all variables that only appear in
nonlinear elements.
It may be used to announce that all the entries in the linear elements
for the variable under consideration are to be scaled.
On Z cards,
the numerical value of this scale factor, the amount
by which each entry is to be divided, is that previously associated
with the real parameter r-p-a-name given in field 5. On other
cards,
the actual scale factor numerical-vl occupies up to 12
characters in data field 4.
It may be used to specify that the variable(s) mentioned in field 2
is(are) only allowed to take integer values. In this case field 3 will
contain the string 'INTEGER'.
It may be used to specify that the variable(s) mentioned in field 2
is(are) only allowed to take the values 0 or 1. In this case field 3 will
contain the string 'ZERO-ONE'.
