scippp::params::HEURISTICS::SHIFTANDPROPAGATE Namespace Reference

Parameters with prefix heuristics/shiftandpropagate. More...

Variables
constexpr Param< bool >	BINLOCKSFIRST { "heuristics/shiftandpropagate/binlocksfirst" }
	should binary variables with no locks be preferred in the ordering?
constexpr Param< bool >	COLLECTSTATS { "heuristics/shiftandpropagate/collectstats" }
	should variable statistics be collected during probing?
constexpr Param< int >	CUTOFFBREAKER { "heuristics/shiftandpropagate/cutoffbreaker" }
	The number of cutoffs before heuristic stops.
constexpr Param< bool >	FIXBINLOCKS { "heuristics/shiftandpropagate/fixbinlocks" }
	should binary variables with no locks in one direction be fixed to that direction?
constexpr Param< int >	FREQ { "heuristics/shiftandpropagate/freq" }
	frequency for calling primal heuristic <shiftandpropagate> (-1: never, 0: only at depth freqofs)
constexpr Param< int >	FREQOFS { "heuristics/shiftandpropagate/freqofs" }
	frequency offset for calling primal heuristic <shiftandpropagate>
constexpr Param< bool >	IMPLISCONTINUOUS { "heuristics/shiftandpropagate/impliscontinuous" }
	should implicit integer variables be treated as continuous variables?
constexpr Param< double >	MAXCUTOFFQUOT { "heuristics/shiftandpropagate/maxcutoffquot" }
	maximum percentage of allowed cutoffs before stopping the heuristic
constexpr Param< int >	MAXDEPTH { "heuristics/shiftandpropagate/maxdepth" }
	maximal depth level to call primal heuristic <shiftandpropagate> (-1: no limit)
constexpr Param< double >	MINFIXINGRATELP { "heuristics/shiftandpropagate/minfixingratelp" }
	minimum fixing rate over all variables (including continuous) to solve LP
constexpr Param< bool >	NORMALIZE { "heuristics/shiftandpropagate/normalize" }
	should coefficients and left/right hand sides be normalized by max row coeff?
constexpr Param< bool >	NOZEROFIXING { "heuristics/shiftandpropagate/nozerofixing" }
	should variables with a zero shifting value be delayed instead of being fixed?
constexpr Param< int >	NPROPROUNDS { "heuristics/shiftandpropagate/nproprounds" }
	The number of propagation rounds used for each propagation.
constexpr Param< bool >	ONLYWITHOUTSOL { "heuristics/shiftandpropagate/onlywithoutsol" }
	Should heuristic only be executed if no primal solution was found, yet?
constexpr Param< bool >	PREFERBINARIES { "heuristics/shiftandpropagate/preferbinaries" }
	Should binary variables be shifted first?
constexpr Param< int >	PRIORITY { "heuristics/shiftandpropagate/priority" }
	priority of heuristic <shiftandpropagate>
constexpr Param< bool >	PROBING { "heuristics/shiftandpropagate/probing" }
	Should domains be reduced by probing?
constexpr Param< bool >	RELAX { "heuristics/shiftandpropagate/relax" }
	Should continuous variables be relaxed?
constexpr Param< bool >	SELECTBEST { "heuristics/shiftandpropagate/selectbest" }
	should the heuristic choose the best candidate in every round? (set to FALSE for static order)?
constexpr Param< char >	SORTKEY { "heuristics/shiftandpropagate/sortkey" }
	the key for variable sorting: (n)orms down, norms (u)p, (v)iolations down, viola(t)ions up, or (r)andom
constexpr Param< bool >	SORTVARS { "heuristics/shiftandpropagate/sortvars" }
	Should variables be sorted for the heuristic?
constexpr Param< bool >	STOPAFTERFEASIBLE { "heuristics/shiftandpropagate/stopafterfeasible" }
	Should the heuristic stop calculating optimal shift values when no more rows are violated?
constexpr Param< bool >	UPDATEWEIGHTS { "heuristics/shiftandpropagate/updateweights" }
	should row weight be increased every time the row is violated?

Detailed Description

Parameters with prefix heuristics/shiftandpropagate.

Variable Documentation

BINLOCKSFIRST

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::BINLOCKSFIRST { "heuristics/shiftandpropagate/binlocksfirst" }

constexpr

should binary variables with no locks be preferred in the ordering?

Definition at line 3888 of file parameters.hpp.

COLLECTSTATS

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::COLLECTSTATS { "heuristics/shiftandpropagate/collectstats" }

constexpr

should variable statistics be collected during probing?

Definition at line 3878 of file parameters.hpp.

CUTOFFBREAKER

constexpr Param<int> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::CUTOFFBREAKER { "heuristics/shiftandpropagate/cutoffbreaker" }

constexpr

The number of cutoffs before heuristic stops.

Definition at line 3872 of file parameters.hpp.

FIXBINLOCKS

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::FIXBINLOCKS { "heuristics/shiftandpropagate/fixbinlocks" }

constexpr

should binary variables with no locks in one direction be fixed to that direction?

Definition at line 3886 of file parameters.hpp.

FREQ

constexpr Param<int> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::FREQ { "heuristics/shiftandpropagate/freq" }

constexpr

frequency for calling primal heuristic <shiftandpropagate> (-1: never, 0: only at depth freqofs)

Definition at line 3858 of file parameters.hpp.

FREQOFS

constexpr Param<int> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::FREQOFS { "heuristics/shiftandpropagate/freqofs" }

constexpr

frequency offset for calling primal heuristic <shiftandpropagate>

Definition at line 3860 of file parameters.hpp.

IMPLISCONTINUOUS

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::IMPLISCONTINUOUS { "heuristics/shiftandpropagate/impliscontinuous" }

constexpr

should implicit integer variables be treated as continuous variables?

Definition at line 3894 of file parameters.hpp.

MAXCUTOFFQUOT

constexpr Param<double> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::MAXCUTOFFQUOT { "heuristics/shiftandpropagate/maxcutoffquot" }

constexpr

maximum percentage of allowed cutoffs before stopping the heuristic

Definition at line 3898 of file parameters.hpp.

MAXDEPTH

constexpr Param<int> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::MAXDEPTH { "heuristics/shiftandpropagate/maxdepth" }

constexpr

maximal depth level to call primal heuristic <shiftandpropagate> (-1: no limit)

Definition at line 3862 of file parameters.hpp.

MINFIXINGRATELP

constexpr Param<double> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::MINFIXINGRATELP { "heuristics/shiftandpropagate/minfixingratelp" }

constexpr

minimum fixing rate over all variables (including continuous) to solve LP

Definition at line 3900 of file parameters.hpp.

NORMALIZE

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::NORMALIZE { "heuristics/shiftandpropagate/normalize" }

constexpr

should coefficients and left/right hand sides be normalized by max row coeff?

Definition at line 3890 of file parameters.hpp.

NOZEROFIXING

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::NOZEROFIXING { "heuristics/shiftandpropagate/nozerofixing" }

constexpr

should variables with a zero shifting value be delayed instead of being fixed?

Definition at line 3884 of file parameters.hpp.

NPROPROUNDS

constexpr Param<int> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::NPROPROUNDS { "heuristics/shiftandpropagate/nproprounds" }

constexpr

The number of propagation rounds used for each propagation.

Definition at line 3864 of file parameters.hpp.

ONLYWITHOUTSOL

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::ONLYWITHOUTSOL { "heuristics/shiftandpropagate/onlywithoutsol" }

constexpr

Should heuristic only be executed if no primal solution was found, yet?

Definition at line 3870 of file parameters.hpp.

PREFERBINARIES

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::PREFERBINARIES { "heuristics/shiftandpropagate/preferbinaries" }

constexpr

Should binary variables be shifted first?

Definition at line 3882 of file parameters.hpp.

PRIORITY

constexpr Param<int> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::PRIORITY { "heuristics/shiftandpropagate/priority" }

constexpr

priority of heuristic <shiftandpropagate>

Definition at line 3856 of file parameters.hpp.

PROBING

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::PROBING { "heuristics/shiftandpropagate/probing" }

constexpr

Should domains be reduced by probing?

Definition at line 3868 of file parameters.hpp.

RELAX

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::RELAX { "heuristics/shiftandpropagate/relax" }

constexpr

Should continuous variables be relaxed?

Definition at line 3866 of file parameters.hpp.

SELECTBEST

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::SELECTBEST { "heuristics/shiftandpropagate/selectbest" }

constexpr

should the heuristic choose the best candidate in every round? (set to FALSE for static order)?

Definition at line 3896 of file parameters.hpp.

SORTKEY

constexpr Param<char> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::SORTKEY { "heuristics/shiftandpropagate/sortkey" }

constexpr

the key for variable sorting: (n)orms down, norms (u)p, (v)iolations down, viola(t)ions up, or (r)andom

Definition at line 3874 of file parameters.hpp.

SORTVARS

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::SORTVARS { "heuristics/shiftandpropagate/sortvars" }

constexpr

Should variables be sorted for the heuristic?

Definition at line 3876 of file parameters.hpp.

STOPAFTERFEASIBLE

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::STOPAFTERFEASIBLE { "heuristics/shiftandpropagate/stopafterfeasible" }

constexpr

Should the heuristic stop calculating optimal shift values when no more rows are violated?

Definition at line 3880 of file parameters.hpp.

UPDATEWEIGHTS

constexpr Param<bool> scippp::params::HEURISTICS::SHIFTANDPROPAGATE::UPDATEWEIGHTS { "heuristics/shiftandpropagate/updateweights" }

constexpr

should row weight be increased every time the row is violated?

Definition at line 3892 of file parameters.hpp.