Xpress NonLinear Formulae
Xpress NonLinear can handle formulae described in three different ways:
- Character strings
- The formula is written exactly as it would appear in, for example, the Extended MPS format used for text file input.
- Internal unparsed format
-
The tokens within the formula are replaced by a
{token type, token value} pair. The list of types and values is in the table below. - Internal parsed format
- The tokens are converted as in the unparsed format, but the order is changed so that the resulting array forms a reverse-Polish execution stack for direct evaluation by the system.
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