Detailed Description
pseudo costs branching rule
Definition in file branch_pscost.c.
#include "blockmemshell/memory.h"
#include "scip/branch_pscost.h"
#include "scip/pub_branch.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_misc_sort.h"
#include "scip/pub_tree.h"
#include "scip/pub_var.h"
#include "scip/scip_branch.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_randnumgen.h"
#include "scip/scip_sol.h"
#include "scip/scip_tree.h"
#include "scip/scip_var.h"
#include <string.h>
Go to the source code of this file.
Macros | |
#define | BRANCHRULE_NAME "pscost" |
#define | BRANCHRULE_DESC "branching on pseudo cost values" |
#define | BRANCHRULE_PRIORITY 2000 |
#define | BRANCHRULE_MAXDEPTH -1 |
#define | BRANCHRULE_MAXBOUNDDIST 1.0 |
#define | BRANCHRULE_STRATEGIES "dsuv" |
#define | BRANCHRULE_STRATEGY_DEFAULT 'u' |
#define | BRANCHRULE_SCOREMINWEIGHT_DEFAULT 0.8 |
#define | BRANCHRULE_SCOREMAXWEIGHT_DEFAULT 1.3 |
#define | BRANCHRULE_SCORESUMWEIGHT_DEFAULT 0.1 |
#define | BRANCHRULE_NCHILDREN_DEFAULT 2 |
#define | BRANCHRULE_NARYMAXDEPTH_DEFAULT -1 |
#define | BRANCHRULE_NARYMINWIDTH_DEFAULT 0.001 |
#define | BRANCHRULE_NARYWIDTHFAC_DEFAULT 2.0 |
#define | BRANCHRULE_RANDSEED_DEFAULT 47 |
#define | WEIGHTEDSCORING(data, min, max, sum) ((data)->scoreminweight * (min) + (data)->scoremaxweight * (max) + (data)->scoresumweight * (sum)) |
Functions | |
static SCIP_RETCODE | updateBestCandidate (SCIP *scip, SCIP_BRANCHRULEDATA *branchruledata, SCIP_VAR **bestvar, SCIP_Real *bestbrpoint, SCIP_Real *bestscore, SCIP_Real *bestrndscore, SCIP_VAR *cand, SCIP_Real candscoremin, SCIP_Real candscoremax, SCIP_Real candscoresum, SCIP_Real candrndscore, SCIP_Real candsol) |
static SCIP_RETCODE | selectBranchVar (SCIP *scip, SCIP_BRANCHRULE *branchrule, SCIP_VAR **cands, SCIP_Real *candssol, SCIP_Real *candsscore, int ncands, SCIP_VAR **brvar, SCIP_Real *brpoint) |
static | SCIP_DECL_BRANCHCOPY (branchCopyPscost) |
static | SCIP_DECL_BRANCHFREE (branchFreePscost) |
static | SCIP_DECL_BRANCHINIT (branchInitPscost) |
static | SCIP_DECL_BRANCHEXECLP (branchExeclpPscost) |
static | SCIP_DECL_BRANCHEXECEXT (branchExecextPscost) |
SCIP_RETCODE | SCIPincludeBranchrulePscost (SCIP *scip) |
SCIP_RETCODE | SCIPselectBranchVarPscost (SCIP *scip, SCIP_VAR **branchcands, SCIP_Real *branchcandssol, SCIP_Real *branchcandsscore, int nbranchcands, SCIP_VAR **var, SCIP_Real *brpoint) |
Macro Definition Documentation
◆ BRANCHRULE_NAME
#define BRANCHRULE_NAME "pscost" |
Definition at line 53 of file branch_pscost.c.
Referenced by SCIP_DECL_BRANCHCOPY(), SCIP_DECL_BRANCHEXECEXT(), SCIP_DECL_BRANCHEXECLP(), SCIPincludeBranchrulePscost(), and SCIPselectBranchVarPscost().
◆ BRANCHRULE_DESC
#define BRANCHRULE_DESC "branching on pseudo cost values" |
Definition at line 54 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_PRIORITY
#define BRANCHRULE_PRIORITY 2000 |
Definition at line 55 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_MAXDEPTH
#define BRANCHRULE_MAXDEPTH -1 |
Definition at line 56 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_MAXBOUNDDIST
#define BRANCHRULE_MAXBOUNDDIST 1.0 |
Definition at line 57 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_STRATEGIES
#define BRANCHRULE_STRATEGIES "dsuv" |
possible pseudo cost multiplication strategies for branching on external candidates
Definition at line 59 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_STRATEGY_DEFAULT
#define BRANCHRULE_STRATEGY_DEFAULT 'u' |
default pseudo cost multiplication strategy
Definition at line 60 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_SCOREMINWEIGHT_DEFAULT
#define BRANCHRULE_SCOREMINWEIGHT_DEFAULT 0.8 |
default weight for minimum of scores of a branching candidate
Definition at line 61 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_SCOREMAXWEIGHT_DEFAULT
#define BRANCHRULE_SCOREMAXWEIGHT_DEFAULT 1.3 |
default weight for maximum of scores of a branching candidate
Definition at line 62 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_SCORESUMWEIGHT_DEFAULT
#define BRANCHRULE_SCORESUMWEIGHT_DEFAULT 0.1 |
default weight for sum of scores of a branching candidate
Definition at line 63 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_NCHILDREN_DEFAULT
#define BRANCHRULE_NCHILDREN_DEFAULT 2 |
default number of children in n-ary branching
Definition at line 64 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_NARYMAXDEPTH_DEFAULT
#define BRANCHRULE_NARYMAXDEPTH_DEFAULT -1 |
default maximal depth where to do n-ary branching
Definition at line 65 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_NARYMINWIDTH_DEFAULT
#define BRANCHRULE_NARYMINWIDTH_DEFAULT 0.001 |
default minimal domain width in children when doing n-ary branching
Definition at line 66 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_NARYWIDTHFAC_DEFAULT
#define BRANCHRULE_NARYWIDTHFAC_DEFAULT 2.0 |
default factor of domain width in n-ary branching
Definition at line 67 of file branch_pscost.c.
Referenced by SCIPincludeBranchrulePscost().
◆ BRANCHRULE_RANDSEED_DEFAULT
#define BRANCHRULE_RANDSEED_DEFAULT 47 |
initial random seed
Definition at line 68 of file branch_pscost.c.
Referenced by SCIP_DECL_BRANCHINIT(), and SCIPincludeBranchrulePscost().
◆ WEIGHTEDSCORING
#define WEIGHTEDSCORING | ( | data, | |
min, | |||
max, | |||
sum | |||
) | ((data)->scoreminweight * (min) + (data)->scoremaxweight * (max) + (data)->scoresumweight * (sum)) |
Definition at line 71 of file branch_pscost.c.
Referenced by updateBestCandidate().
Function Documentation
◆ updateBestCandidate()
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static |
checks if a given branching candidate is better than a previous one and updates the best branching candidate accordingly
- Parameters
-
scip SCIP data structure branchruledata branching rule data bestvar best branching candidate bestbrpoint branching point for best branching candidate bestscore score of best branching candidate bestrndscore random score of the best branching candidate cand branching candidate to consider candscoremin minimal score of branching candidate candscoremax maximal score of branching candidate candscoresum sum of scores of branching candidate candrndscore random score of branching candidate candsol proposed branching point of branching candidate
Definition at line 98 of file branch_pscost.c.
References FALSE, NULL, REALABS, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_MULTAGGR, SCIP_VARTYPE_CONTINUOUS, SCIPABORT, SCIPadjustedVarLb(), SCIPadjustedVarUb(), SCIPcomputeVarLbLocal(), SCIPcomputeVarUbLocal(), SCIPdebugMsg, SCIPerrorMessage, SCIPgetBranchingPoint(), SCIPgetBranchScore(), SCIPgetSolVal(), SCIPgetVarPseudocostVal(), SCIPinfinity(), SCIPisEQ(), SCIPisFeasGE(), SCIPisFeasLE(), SCIPisHugeValue(), SCIPisInfinity(), SCIPisIntegral(), SCIPisNegative(), SCIPisSumEQ(), SCIPisSumGT(), SCIPrandomGetReal(), SCIPrelDiff(), SCIPvarGetLbLocal(), SCIPvarGetMultaggrNVars(), SCIPvarGetMultaggrScalars(), SCIPvarGetMultaggrVars(), SCIPvarGetName(), SCIPvarGetProbvar(), SCIPvarGetStatus(), SCIPvarGetType(), SCIPvarGetUbLocal(), SCIPvarIsActive(), TRUE, and WEIGHTEDSCORING.
Referenced by selectBranchVar().
◆ selectBranchVar()
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static |
selects the branching variable from given candidate array
- Parameters
-
scip SCIP data structure branchrule branching rule cands array of branching candidates candssol array of candidate solution values candsscore array of candidate scores ncands the number of candidates brvar pointer to store the selected branching candidate or NULL if none brpoint pointer to store branching point of selected branching variable
Definition at line 451 of file branch_pscost.c.
References NULL, REALABS, SCIP_BRANCHERROR, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPbranchruleGetData(), SCIPduplicateBufferArray, SCIPerrorMessage, SCIPfreeBufferArray, SCIPisEQ(), SCIPisInfinity(), SCIPrandomGetReal(), SCIPsortPtrInt(), SCIPvarCompare(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), and updateBestCandidate().
Referenced by SCIP_DECL_BRANCHEXECEXT(), and SCIPselectBranchVarPscost().
◆ SCIP_DECL_BRANCHCOPY()
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static |
copy method for branchrule plugins (called when SCIP copies plugins)
Definition at line 561 of file branch_pscost.c.
References BRANCHRULE_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPbranchruleGetName(), and SCIPincludeBranchrulePscost().
◆ SCIP_DECL_BRANCHFREE()
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static |
destructor of branching rule to free user data (called when SCIP is exiting)
Definition at line 575 of file branch_pscost.c.
References NULL, SCIP_OKAY, SCIPbranchruleGetData(), SCIPbranchruleSetData(), SCIPfreeBlockMemory, and SCIPfreeRandom().
◆ SCIP_DECL_BRANCHINIT()
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static |
initialization method of branching rule (called after problem was transformed)
Definition at line 595 of file branch_pscost.c.
References BRANCHRULE_RANDSEED_DEFAULT, NULL, SCIP_OKAY, SCIPbranchruleGetData(), and SCIPsetRandomSeed().
◆ SCIP_DECL_BRANCHEXECLP()
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static |
branching execution method for fractional LP solutions
Definition at line 610 of file branch_pscost.c.
References BRANCHRULE_NAME, NULL, REALABS, SCIP_BRANCHED, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPbranchruleGetName(), SCIPbranchVar(), SCIPdebugMsg, SCIPgetLPBranchCands(), SCIPgetVarPseudocostScore(), SCIPinfinity(), SCIPisFeasIntegral(), SCIPisSumEQ(), SCIPisSumGT(), SCIPvarGetName(), SCIPvarGetRootSol(), SCIPvarGetSol(), and TRUE.
◆ SCIP_DECL_BRANCHEXECEXT()
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static |
branching execution method for external candidates
Definition at line 668 of file branch_pscost.c.
References BRANCHRULE_NAME, NULL, SCIP_BRANCHED, SCIP_CALL, SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIPadjustedVarLb(), SCIPadjustedVarUb(), SCIPbranchruleGetData(), SCIPbranchruleGetName(), SCIPbranchVarValNary(), SCIPdebugMsg, SCIPgetCharParam(), SCIPgetCurrentNode(), SCIPgetExternBranchCands(), SCIPisEQ(), SCIPisInfinity(), SCIPnodeGetDepth(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetProbvar(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), SCIPvarIsActive(), and selectBranchVar().