Scippy

SCIP

Solving Constraint Integer Programs

bandit_exp3.h File Reference

Detailed Description

internal methods for Exp.3 bandit algorithm

Author
Gregor Hendel

Definition in file bandit_exp3.h.

#include "scip/scip.h"
#include "scip/bandit.h"

Go to the source code of this file.

Functions

SCIP_RETCODE SCIPincludeBanditvtableExp3 (SCIP *scip)
 
 SCIP_DECL_BANDITFREE (SCIPbanditFreeExp3)
 
 SCIP_DECL_BANDITSELECT (SCIPbanditSelectExp3)
 
 SCIP_DECL_BANDITUPDATE (SCIPbanditUpdateExp3)
 
 SCIP_DECL_BANDITRESET (SCIPbanditResetExp3)
 
SCIP_RETCODE SCIPbanditCreateExp3 (BMS_BLKMEM *blkmem, BMS_BUFMEM *bufmem, SCIP_BANDITVTABLE *vtable, SCIP_BANDIT **exp3, SCIP_Real *priorities, SCIP_Real gammaparam, SCIP_Real beta, int nactions, unsigned int initseed)
 

Function Documentation

◆ SCIPincludeBanditvtableExp3()

SCIP_RETCODE SCIPincludeBanditvtableExp3 ( SCIP scip)

include virtual function table for Exp.3 bandit algorithms

Parameters
scipSCIP data structure

Definition at line 365 of file bandit_exp3.c.

References BANDIT_NAME, SCIP_CALL, SCIP_OKAY, and SCIPincludeBanditvtable().

Referenced by SCIPincludeCorePlugins().

◆ SCIP_DECL_BANDITFREE()

SCIP_DECL_BANDITFREE ( SCIPbanditFreeExp3  )

callback to free bandit specific data structures

Definition at line 52 of file bandit_exp3.c.

References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, SCIP_OKAY, SCIPbanditGetData(), SCIPbanditGetNActions(), and SCIPbanditSetData().

◆ SCIP_DECL_BANDITSELECT()

SCIP_DECL_BANDITSELECT ( SCIPbanditSelectExp3  )

selection callback for bandit selector

Definition at line 73 of file bandit_exp3.c.

References SCIP_OKAY, SCIP_Real, SCIPbanditGetData(), SCIPbanditGetNActions(), SCIPbanditGetRandnumgen(), and SCIPrandomGetReal().

◆ SCIP_DECL_BANDITUPDATE()

SCIP_DECL_BANDITUPDATE ( SCIPbanditUpdateExp3  )

update callback for bandit algorithm

Definition at line 132 of file bandit_exp3.c.

References EPSZ, exp(), NUMTOL, SCIP_OKAY, SCIP_Real, SCIPbanditGetData(), and SCIPbanditGetNActions().

◆ SCIP_DECL_BANDITRESET()

SCIP_DECL_BANDITRESET ( SCIPbanditResetExp3  )

reset callback for bandit algorithm

Definition at line 207 of file bandit_exp3.c.

References NUMTOL, SCIP_OKAY, SCIP_Real, SCIPbanditGetData(), and SCIPbanditGetNActions().

◆ SCIPbanditCreateExp3()

SCIP_RETCODE SCIPbanditCreateExp3 ( BMS_BLKMEM blkmem,
BMS_BUFMEM bufmem,
SCIP_BANDITVTABLE vtable,
SCIP_BANDIT **  exp3,
SCIP_Real priorities,
SCIP_Real  gammaparam,
SCIP_Real  beta,
int  nactions,
unsigned int  initseed 
)

direct bandit creation method for the core where no SCIP pointer is available

Parameters
blkmemblock memory data structure
bufmembuffer memory
vtablevirtual function table for callback functions of Exp.3
exp3pointer to store bandit algorithm
prioritiesnonnegative priorities for each action, or NULL if not needed
gammaparamweight between uniform (gamma ~ 1) and weight driven (gamma ~ 0) probability distribution
betagain offset between 0 and 1 at every observation
nactionsthe positive number of actions for this bandit algorithm
initseedinitial random seed

Definition at line 269 of file bandit_exp3.c.

References BMSallocBlockMemory, BMSallocBlockMemoryArray, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, and SCIPbanditCreate().

Referenced by SCIPcreateBanditExp3().