Initializing help system before first use

# XSLP_FILTER, SLPFILTER

Description | Bit map for controlling solution updates
Type | Integer
Topic areas | SLP, Bit-vector, Solution
Values |
Bit | Meaning
0 | retain best solution according to the merit function.
1 | check cascaded solutions against improvements in the merit function.
2 | force minimum step sizes in line search.
3 | accept the trust region step is the line search returns a zero step size.
Default value | 3 (bit 0,1)
Notes | Bit 0 determines whether XSLPgetslpsol should return the final converged solution (if the bit is off), or the solution which had the best value according to the merit function (if the bit is on, which is the default). If bit 1 is set, a cascaded solution which does not improve the merit function will be rejected (XSLP will revert to the solution of the linearization). Bits 2-3 determine the strategy for when the step direction is not improving according to the merit function. The following constants are provided for setting these bits:
Setting bit 0 | XSLP_FILTER_KEEPBEST
Setting bit 1 | XSLP_FILTER_CASCADE
Setting bit 2 | XSLP_FILTER_ZEROLINESEARCH
Setting bit 3 | XSLP_FILTER_ZEROLINESEARCHTR
Affects routines | XSLPmaxim, XSLPminim, XSLPcascade
See also | XSLP_MERITLAMBDA, XSLP_CASCADE, XSLP_LSSTART, XSLP_LSITERLIMIT, XSLP_LSPATTERNLIMIT
Category | Control

Parent Topic Integer control parameters

© 2001-2026 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.