Initializing help system before first use

XSLP_FUNCEVAL, NLPFUNCEVAL

Description
Bit map for determining the method of evaluating user functions and their derivatives
Type
Integer
Values
Bit
Meaning
3 
evaluate function whenever independent variables change.
4 
evaluate function when independent variables change outside tolerances.
5 
application of bits 3-4: 0 = functions which do not have a defined re-evaluation mode;1 = all functions.
6 
tangential derivatives.
7 
forward derivatives
8 
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.

The following constants are provided for setting these bits:

Setting bit 3 XSLP_RECALC
Setting bit 4 XSLP_TOLCALC
Setting bit 5 XSLP_ALLCALCS
Setting bit 6 XSLP_2DERIVATIVE
Setting bit 7 XSLP_1DERIVATIVE
Setting bit 8 XSLP_ALLDERIVATIVES

Affects routines
XSLPevaluatecoef, XSLPevaluateformula
See also
XSLP_EVALUATE

Parent Topic Integer control parameters

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