Initializing help system before first use

NLPFUNCEVAL, XSLP_FUNCEVAL

Description
Bit map for determining the method of evaluating user functions and their derivatives
Type
Integer
Topic areas
User Functions, Derivatives
Values
Bit
Meaning
3 
XPRS_NLPRECALC evaluate function whenever independent variables change.
4 
XPRS_NLPTOLCALC evaluate function when independent variables change outside tolerances.
5 
XPRS_NLPALLCALCS application of bits 3-4: 0 = functions which do not have a defined re-evaluation mode;1 = all functions.
6 
XPRS_NLP2DERIVATIVE tangential derivatives.
7 
XPRS_NLP1DERIVATIVE forward derivatives
8 
XPRS_NLPALLDERIVATIVES application of bits 6-7: 0 = functions which do not have a defined derivative mode;1 = all functions.
Default value
0
Notes
Bits 3-4 determine the type of function re-evaluation. If both bits are zero, then the settings for each individual function are used.
If bit 3 or bit 4 is set, then bit 5 defines which functions the setting applies to. If it is set to 1, then it applies to all functions. Otherwise, it applies only to functions which do not have an explicit setting of their own.
Bits 6-7 determine the type of calculation for numerical derivatives. If both bits are zero, then the settings for each individual function are used.
If bit 6 or bit 7 is set, then bit 8 defines which functions the setting applies to. If it is set to 1, then it applies to all functions. Otherwise, it applies only to functions which do not have an explicit setting of their own.
Affects routines
XPRSslpevaluatecoef, XPRSnlpevaluateformula
See also
NLPEVALUATE
Category
Control

Parent Topic Integer control parameters

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