Arbitrary reference number assigned to the resulting variable (2 to NV [NUMVAR]). If this number is the same as for a previously defined variable, the previously defined variable will be overwritten with this result.

Reference numbers of variables to be operated on. IY is differentiated with respect to IX.

Unused field.

Thirty-two character name for identifying the variable on printouts and displays. Embedded blanks are compressed for output.

Unused fields.

Scaling factor (positive or negative) applied as shown below (defaults to 1.0).