Initializing help system before first use

# XSLP_EVALUATE, NLPEVALUATE

Description | Evaluation strategy for user functions
Type | Integer
Topic area | User Functions
Values |
0 | use derivatives where possible;
1 | always re-evaluate.
Default value | 0
Note | If a user function returns derivatives or returns more than one value, then it is possible for Xpress NonLinear to estimate the value of the function from its derivatives if the new point of evaluation is sufficiently close to the original. Setting XSLP_EVALUATE to 1 will force re-evaluation of all functions regardless of how much or little the point of evaluation has changed.
Affects routines | XSLPevaluatecoef, XSLPevaluateformula
See also | XSLP_FUNCEVAL
Category | Control

Parent Topic Integer control parameters

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