Cookie Settings

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.

Free Trial

Documentation

Try our new documentation site (beta).

Filter Content By
Version
Text Search
Table of contents
Filter by Language
Quick Start Guides
Example Tour
Reference Manual
AMPL-Gurobi Guide
Remote Services
Cloud Guide
C API Overview
C API Details
Environment Creation and Destruction +
GRBloadenv
GRBemptyenv
GRBstartenv
GRBloadclientenv
GRBloadcloudenv
GRBfreeenv
GRBgetconcurrentenv
GRBgetmultiobjenv
GRBdiscardconcurrentenvs
GRBdiscardmultiobjenvs
Model Creation and Modification +
GRBloadmodel
GRBnewmodel
GRBcopymodel
GRBaddconstr
GRBaddconstrs
GRBaddgenconstrXxx
GRBaddgenconstrMax
GRBaddgenconstrMin
GRBaddgenconstrAbs
GRBaddgenconstrAnd
GRBaddgenconstrOr
GRBaddgenconstrIndicator
GRBaddgenconstrPWL
GRBaddgenconstrPoly
GRBaddgenconstrExp
GRBaddgenconstrExpA
GRBaddgenconstrLog
GRBaddgenconstrLogA
GRBaddgenconstrPow
GRBaddgenconstrSin
GRBaddgenconstrCos
GRBaddgenconstrTan
GRBaddqconstr
GRBaddqpterms
GRBaddrangeconstr
GRBaddrangeconstrs
GRBaddsos
GRBaddvar
GRBaddvars
GRBchgcoeffs
GRBdelconstrs
GRBdelgenconstrs
GRBdelq
GRBdelqconstrs
GRBdelsos
GRBdelvars
GRBsetobjectiven
GRBsetpwlobj
GRBupdatemodel
GRBfreemodel
GRBXaddconstrs
GRBXaddrangeconstrs
GRBXaddvars
GRBXchgcoeffs
GRBXloadmodel
Model Solution +
GRBoptimize
GRBoptimizeasync
GRBcomputeIIS
GRBfeasrelax
GRBfixmodel
GRBreset
GRBsync
Model Queries +
GRBgetcoeff
GRBgetconstrbyname
GRBgetconstrs
GRBgetenv
GRBgetgenconstrMax
GRBgetgenconstrMin
GRBgetgenconstrAbs
GRBgetgenconstrAnd
GRBgetgenconstrOr
GRBgetgenconstrIndicator
GRBgetgenconstrPWL
GRBgetgenconstrPoly
GRBgetgenconstrExp
GRBgetgenconstrExpA
GRBgetgenconstrLog
GRBgetgenconstrLogA
GRBgetgenconstrPow
GRBgetgenconstrSin
GRBgetgenconstrCos
GRBgetgenconstrTan
GRBgetjsonsolution
GRBgetpwlobj
GRBgetq
GRBgetqconstr
GRBgetqconstrbyname
GRBgetsos
GRBgetvarbyname
GRBgetvars
GRBsinglescenariomodel
GRBXgetconstrs
GRBXgetvars
Input/Output +
GRBreadmodel
GRBread
GRBwrite
Attribute Management +
GRBgetattrinfo
GRBgetintattr
GRBsetintattr
GRBgetintattrelement
GRBsetintattrelement
GRBgetintattrarray
GRBsetintattrarray
GRBgetintattrlist
GRBsetintattrlist
GRBgetdblattr
GRBsetdblattr
GRBgetdblattrelement
GRBsetdblattrelement
GRBgetdblattrarray
GRBsetdblattrarray
GRBgetdblattrlist
GRBsetdblattrlist
GRBgetcharattrelement
GRBsetcharattrelement
GRBgetcharattrarray
GRBsetcharattrarray
GRBgetcharattrlist
GRBsetcharattrlist
GRBgetstrattr
GRBsetstrattr
GRBgetstrattrelement
GRBsetstrattrelement
GRBgetstrattrarray
GRBsetstrattrarray
GRBgetstrattrlist
GRBsetstrattrlist
GRBgetbatchattrinfo
Parameter Management and Tuning +
GRBtunemodel
GRBgettuneresult
GRBgetdblparam
GRBgetintparam
GRBgetstrparam
GRBsetdblparam
GRBsetintparam
GRBsetstrparam
GRBgetdblparaminfo
GRBgetintparaminfo
GRBgetstrparaminfo
GRBreadparams
GRBwriteparams
Monitoring Progress - Logging and Callbacks +
GRBmsg
GRBsetcallbackfunc
GRBgetcallbackfunc
GRBcbget
GRBversion
Modifying Solver Behavior - Callbacks +
GRBcbcut
GRBcblazy
GRBcbsolution
GRBcbstoponemultiobj
GRBterminate
Batch Requests +
GRBabortbatch
GRBdiscardbatch
GRBfreebatch
GRBgetbatch
GRBgetbatchenv
GRBgetbatchintattr
GRBgetbatchjsonsolution
GRBgetbatchstrattr
GRBoptimizebatch
GRBretrybatch
GRBupdatebatch
GRBwritebatchjsonsolution
Error Handling +
GRBgeterrormsg
Advanced simplex routines +
GRBFSolve
GRBBSolve
GRBBinvColj
GRBBinvRowi
GRBgetBasisHead
C++ API Overview
C++ API Details
GRBEnv +
GRBEnv()
GRBEnv::get()
GRBEnv::getErrorMsg()
GRBEnv::getParamInfo()
GRBEnv::message()
GRBEnv::readParams()
GRBEnv::resetParams()
GRBEnv::set()
GRBEnv::start()
GRBEnv::writeParams()
GRBModel +
GRBModel()
GRBModel::addConstr()
GRBModel::addConstrs()
GRBModel::addGenConstrXxx() +
GRBModel::addGenConstrMax()
GRBModel::addGenConstrMin()
GRBModel::addGenConstrAbs()
GRBModel::addGenConstrAnd()
GRBModel::addGenConstrOr()
GRBModel::addGenConstrIndicator()
GRBModel::addGenConstrPWL()
GRBModel::addGenConstrPoly()
GRBModel::addGenConstrExp()
GRBModel::addGenConstrExpA()
GRBModel::addGenConstrLog()
GRBModel::addGenConstrLogA()
GRBModel::addGenConstrPow()
GRBModel::addGenConstrSin()
GRBModel::addGenConstrCos()
GRBModel::addGenConstrTan()
GRBModel::addQConstr()
GRBModel::addRange()
GRBModel::addRanges()
GRBModel::addSOS()
GRBModel::addVar()
GRBModel::addVars()
GRBModel::chgCoeff()
GRBModel::chgCoeffs()
GRBModel::computeIIS()
GRBModel::discardConcurrentEnvs()
GRBModel::discardMultiobjEnvs()
GRBModel::feasRelax()
GRBModel::fixedModel()
GRBModel::get()
GRBModel::getCoeff()
GRBModel::getCol()
GRBModel::getConcurrentEnv()
GRBModel::getConstrByName()
GRBModel::getConstrs()
GRBModel::getEnv()
GRBModel::getGenConstrXxx() +
GRBModel::getGenConstrMax
GRBModel::getGenConstrMin
GRBModel::getGenConstrAbs
GRBModel::getGenConstrAnd
GRBModel::getGenConstrOr
GRBModel::getGenConstrIndicator
GRBModel::getGenConstrPWL
GRBModel::getGenConstrPoly
GRBModel::getGenConstrExp
GRBModel::getGenConstrExpA
GRBModel::getGenConstrLog
GRBModel::getGenConstrLogA
GRBModel::getGenConstrPow
GRBModel::getGenConstrSin
GRBModel::getGenConstrCos
GRBModel::getGenConstrTan
GRBModel::getGenConstrs()
GRBModel::getJSONSolution()
GRBModel::getMultiobjEnv()
GRBModel::getObjective()
GRBModel::getPWLObj()
GRBModel::getQCRow()
GRBModel::getQConstrs()
GRBModel::getRow()
GRBModel::getSOS()
GRBModel::getSOSs()
GRBModel::getTuneResult()
GRBModel::getVarByName()
GRBModel::getVars()
GRBModel::optimize()
GRBModel::optimizeasync()
GRBModel::optimizeBatch()
GRBModel::presolve()
GRBModel::read()
GRBModel::remove()
GRBModel::reset()
GRBModel::setCallback()
GRBModel::set()
GRBModel::setObjective()
GRBModel::setObjectiveN()
GRBModel::setPWLObj()
GRBModel::singleScenarioModel()
GRBModel::sync()
GRBModel::terminate()
GRBModel::tune()
GRBModel::update()
GRBModel::write()
GRBVar +
GRBVar::get()
GRBVar::index()
GRBVar::sameAs()
GRBVar::set()
GRBConstr +
GRBConstr::get()
GRBConstr::index()
GRBConstr::sameAs()
GRBConstr::set()
GRBQConstr +
GRBQConstr::get()
GRBQConstr::set()
GRBSOS +
GRBSOS::get()
GRBGenConstr +
GRBGenConstr::get()
GRBGenConstr::set()
GRBExpr +
GRBExpr::getValue()
GRBLinExpr +
GRBLinExpr()
GRBLinExpr::addTerms()
GRBLinExpr::clear()
GRBLinExpr::getConstant()
GRBLinExpr::getCoeff()
GRBLinExpr::getValue()
GRBLinExpr::getVar()
GRBLinExpr::operator=
GRBLinExpr::operator+
GRBLinExpr::operator-
GRBLinExpr::operator+=
GRBLinExpr::operator-=
GRBLinExpr::operator*=
GRBLinExpr::remove()
GRBLinExpr::size()
GRBQuadExpr +
GRBQuadExpr()
GRBQuadExpr::addTerm()
GRBQuadExpr::addTerms()
GRBQuadExpr::clear()
GRBQuadExpr::getCoeff()
GRBQuadExpr::getLinExpr()
GRBQuadExpr::getValue()
GRBQuadExpr::getVar1()
GRBQuadExpr::getVar2()
GRBQuadExpr::operator=
GRBQuadExpr::operator+
GRBQuadExpr::operator-
GRBQuadExpr::operator+=
GRBQuadExpr::operator-=
GRBQuadExpr::operator*=
GRBQuadExpr::remove()
GRBQuadExpr::size()
GRBTempConstr
GRBColumn +
GRBColumn()
GRBColumn::addTerm()
GRBColumn::addTerms()
GRBColumn::clear()
GRBColumn::getCoeff()
GRBColumn::getConstr()
GRBColumn::remove()
GRBColumn::size()
GRBCallback +
GRBCallback()
GRBCallback::abort()
GRBCallback::addCut()
GRBCallback::addLazy()
GRBCallback::getDoubleInfo()
GRBCallback::getIntInfo()
GRBCallback::getNodeRel()
GRBCallback::getSolution()
GRBCallback::getStringInfo()
GRBCallback::setSolution()
GRBCallback::stopOneMultiObj() +
GRBCallback::useSolution()
GRBException +
GRBException()
GRBException::getErrorCode()
GRBException::getMessage()
GRBBatch +
GRBBatch()
GRBBatch::abort()
GRBBatch::discard()
GRBBatch::getJSONSolution()
GRBBatch::get()
GRBBatch::retry()
GRBBatch::update()
GRBBatch::writeJSONSolution()
Non-Member Functions +
operator==
operator<=
operator>=
operator+
operator-
operator*
operator/
Attribute Enums +
GRB_CharAttr
GRB_DoubleAttr
GRB_IntAttr
GRB_StringAttr
Parameter Enums +
GRB_DoubleParam
GRB_IntParam
GRB_StringParam
Java API Overview
Java API Details
GRBEnv +
GRBEnv()
GRBEnv.dispose()
GRBEnv.get()
GRBEnv.getErrorMsg()
GRBEnv.getParamInfo()
GRBEnv.message()
GRBEnv.readParams()
GRBEnv.release()
GRBEnv.resetParams()
GRBEnv.set()
GRBEnv.start()
GRBEnv.writeParams()
GRBModel +
GRBModel()
GRBModel.addConstr()
GRBModel.addConstrs()
GRBModel.addGenConstrXxx() +
GRBModel.addGenConstrMax()
GRBModel.addGenConstrMin()
GRBModel.addGenConstrAbs()
GRBModel.addGenConstrAnd()
GRBModel.addGenConstrOr()
GRBModel.addGenConstrIndicator()
GRBModel.addGenConstrPWL()
GRBModel.addGenConstrPoly()
GRBModel.addGenConstrExp()
GRBModel.addGenConstrExpA()
GRBModel.addGenConstrLog()
GRBModel.addGenConstrLogA()
GRBModel.addGenConstrPow()
GRBModel.addGenConstrSin()
GRBModel.addGenConstrCos()
GRBModel.addGenConstrTan()
GRBModel.addQConstr()
GRBModel.addRange()
GRBModel.addRanges()
GRBModel.addSOS()
GRBModel.addVar()
GRBModel.addVars()
GRBModel.chgCoeff()
GRBModel.chgCoeffs()
GRBModel.computeIIS()
GRBModel.discardConcurrentEnvs()
GRBModel.discardMultiobjEnvs()
GRBModel.dispose()
GRBModel.feasRelax()
GRBModel.fixedModel()
GRBModel.get()
GRBModel.getCoeff()
GRBModel.getCol()
GRBModel.getConcurrentEnv()
GRBModel.getConstrByName()
GRBModel.getConstrs()
GRBModel.getEnv()
GRBModel.getGenConstrXxx() +
GRBModel.getGenConstrMax
GRBModel.getGenConstrMin
GRBModel.getGenConstrAbs
GRBModel.getGenConstrAnd
GRBModel.getGenConstrOr
GRBModel.getGenConstrIndicator
GRBModel.getGenConstrPWL
GRBModel.getGenConstrPoly
GRBModel.getGenConstrExp
GRBModel.getGenConstrExpA
GRBModel.getGenConstrLog
GRBModel.getGenConstrLogA
GRBModel.getGenConstrPow
GRBModel.getGenConstrSin
GRBModel.getGenConstrCos
GRBModel.getGenConstrTan
GRBModel.getGenConstrs()
GRBModel.getJSONSolution()
GRBModel.getMultiobjEnv()
GRBModel.getObjective()
GRBModel.getPWLObj()
GRBModel.getQCRow()
GRBModel.getQConstrs()
GRBModel.getRow()
GRBModel.getSOS()
GRBModel.getSOSs()
GRBModel.getTuneResult()
GRBModel.getVarByName()
GRBModel.getVars()
GRBModel.optimize()
GRBModel.optimizeasync()
GRBModel.optimizeBatch()
GRBModel.presolve()
GRBModel.read()
GRBModel.remove()
GRBModel.reset()
GRBModel.setCallback()
GRBModel.set()
GRBModel.setObjective()
GRBModel.setObjectiveN()
GRBModel.setPWLObj()
GRBModel.singleScenarioModel()
GRBModel.sync()
GRBModel.terminate()
GRBModel.tune()
GRBModel.update()
GRBModel.write()
GRBVar +
GRBVar.get()
GRBVar.index()
GRBVar.sameAs()
GRBVar.set()
GRBConstr +
GRBConstr.get()
GRBConstr.index()
GRBConstr.sameAs()
GRBConstr.set()
GRBQConstr +
GRBQConstr.get()
GRBQConstr.set()
GRBSOS +
GRBSOS.get()
GRBGenConstr +
GRBGenConstr.get()
GRBGenConstr.set()
GRBExpr +
GRBExpr.getValue()
GRBLinExpr +
GRBLinExpr()
GRBLinExpr.add()
GRBLinExpr.addConstant()
GRBLinExpr.addTerm()
GRBLinExpr.addTerms()
GRBLinExpr.clear()
GRBLinExpr.getConstant()
GRBLinExpr.getCoeff()
GRBLinExpr.getValue()
GRBLinExpr.getVar()
GRBLinExpr.multAdd()
GRBLinExpr.remove()
GRBLinExpr.size()
GRBQuadExpr +
GRBQuadExpr()
GRBQuadExpr.add()
GRBQuadExpr.addConstant()
GRBQuadExpr.addTerm()
GRBQuadExpr.addTerms()
GRBQuadExpr.clear()
GRBQuadExpr.getCoeff()
GRBQuadExpr.getLinExpr()
GRBQuadExpr.getValue()
GRBQuadExpr.getVar1()
GRBQuadExpr.getVar2()
GRBQuadExpr.multAdd()
GRBQuadExpr.remove()
GRBQuadExpr.size()
GRBColumn +
GRBColumn()
GRBColumn.addTerm()
GRBColumn.addTerms()
GRBColumn.clear()
GRBColumn.getCoeff()
GRBColumn.getConstr()
GRBColumn.remove()
GRBColumn.size()
GRBCallback +
GRBCallback()
GRBCallback.abort()
GRBCallback.addCut()
GRBCallback.addLazy()
GRBCallback.getDoubleInfo()
GRBCallback.getIntInfo()
GRBCallback.getNodeRel()
GRBCallback.getSolution()
GRBCallback.getStringInfo()
GRBCallback.setSolution()
GRBCallback.stopOneMultiObj()
GRBCallback.useSolution()
GRBException +
GRBException()
GRBException.getErrorCode()
GRBBatch +
GRBBatch()
GRBBatch.abort()
GRBBatch.discard()
GRBBatch.dispose()
GRBBatch.getJSONSolution()
GRBBatch.get()
GRBBatch.retry()
GRBBatch.update()
GRBBatch.writeJSONSolution()
GRB +
Constants
GRB.CharAttr
GRB.DoubleAttr
GRB.DoubleParam
GRB.IntAttr
GRB.IntParam
GRB.StringAttr
GRB.StringParam
.NET API Overview
.NET API Details
GRBEnv +
GRBEnv()
GRBEnv.Dispose()
GRBEnv.ErrorMsg
GRBEnv.Get()
GRBEnv.GetParamInfo()
GRBEnv.Message()
GRBEnv.ReadParams()
GRBEnv.Release()
GRBEnv.ResetParams()
GRBEnv.Set()
GRBEnv.Start()
GRBEnv.WriteParams()
GRBModel +
GRBModel()
GRBModel.AddConstr()
GRBModel.AddConstrs()
GRBModel.AddGenConstrXxx() +
GRBModel.AddGenConstrMax()
GRBModel.AddGenConstrMin()
GRBModel.AddGenConstrAbs()
GRBModel.AddGenConstrAnd()
GRBModel.AddGenConstrOr()
GRBModel.AddGenConstrIndicator()
GRBModel.AddGenConstrPWL()
GRBModel.AddGenConstrPoly()
GRBModel.AddGenConstrExp()
GRBModel.AddGenConstrExpA()
GRBModel.AddGenConstrLog()
GRBModel.AddGenConstrLogA()
GRBModel.AddGenConstrPow()
GRBModel.AddGenConstrSin()
GRBModel.AddGenConstrCos()
GRBModel.AddGenConstrTan()
GRBModel.AddQConstr()
GRBModel.AddRange()
GRBModel.AddRanges()
GRBModel.AddSOS()
GRBModel.AddVar()
GRBModel.AddVars()
GRBModel.ChgCoeff()
GRBModel.ChgCoeffs()
GRBModel.ComputeIIS()
GRBModel.DiscardConcurrentEnvs()
GRBModel.DiscardMultiobjEnvs()
GRBModel.Dispose()
GRBModel.FeasRelax()
GRBModel.FixedModel()
GRBModel.Get()
GRBModel.GetCoeff()
GRBModel.GetCol()
GRBModel.GetConcurrentEnv()
GRBModel.GetConstrByName()
GRBModel.GetConstrs()
GRBModel.GetEnv()
GRBModel.GetGenConstrXxx() +
GRBModel.GetGenConstrMax
GRBModel.GetGenConstrMin
GRBModel.GetGenConstrAbs
GRBModel.GetGenConstrAnd
GRBModel.GetGenConstrOr
GRBModel.GetGenConstrIndicator
GRBModel.GetGenConstrPWL
GRBModel.GetGenConstrPoly
GRBModel.GetGenConstrExp
GRBModel.GetGenConstrExpA
GRBModel.GetGenConstrLog
GRBModel.GetGenConstrLogA
GRBModel.GetGenConstrPow
GRBModel.GetGenConstrSin
GRBModel.GetGenConstrCos
GRBModel.GetGenConstrTan
GRBModel.GetGenConstrs()
GRBModel.GetJSONSolution()
GRBModel.GetMultiobjEnv()
GRBModel.GetObjective()
GRBModel.GetPWLObj()
GRBModel.GetQConstr()
GRBModel.GetQConstrs()
GRBModel.GetQCRow()
GRBModel.GetRow()
GRBModel.GetSOS()
GRBModel.GetSOSs()
GRBModel.GetTuneResult()
GRBModel.GetVarByName()
GRBModel.GetVars()
GRBModel.Optimize()
GRBModel.OptimizeAsync()
GRBModel.OptimizeBatch()
GRBModel.Presolve()
GRBModel.Read()
GRBModel.Remove()
GRBModel.Reset()
GRBModel.SetCallback()
GRBModel.Set()
GRBModel.SetObjective()
GRBModel.SetObjectiveN()
GRBModel.SetPWLObj()
GRBModel.SingleScenarioModel()
GRBModel.Sync()
GRBModel.Terminate()
GRBModel.Tune()
GRBModel.Update()
GRBModel.Write()
GRBVar +
GRBVar.Get()
GRBVar.Index
GRBVar.SameAs()
GRBVar.Set()
GRBConstr +
GRBConstr.Get()
GRBConstr.Index
GRBConstr.SameAs()
GRBConstr.Set()
GRBQConstr +
GRBQConstr.Get()
GRBQConstr.Set()
GRBSOS +
GRBSOS.Get()
GRBGenConstr +
GRBGenConstr.Get()
GRBGenConstr.Set()
GRBExpr +
GRBExpr.Value
GRBLinExpr +
GRBLinExpr()
GRBLinExpr.Add()
GRBLinExpr.AddConstant()
GRBLinExpr.AddTerm()
GRBLinExpr.AddTerms()
GRBLinExpr.Clear()
GRBLinExpr.Constant
GRBLinExpr.GetCoeff()
GRBLinExpr.GetVar()
GRBLinExpr.MultAdd()
GRBLinExpr.Remove()
GRBLinExpr.Size
GRBLinExpr.Value
GRBQuadExpr +
GRBQuadExpr()
GRBQuadExpr.Add()
GRBQuadExpr.AddConstant()
GRBQuadExpr.AddTerm()
GRBQuadExpr.AddTerms()
GRBQuadExpr.Clear()
GRBQuadExpr.GetCoeff()
GRBQuadExpr.GetVar1()
GRBQuadExpr.GetVar2()
GRBQuadExpr.LinExpr()
GRBQuadExpr.MultAdd()
GRBQuadExpr.Remove()
GRBQuadExpr.Size
GRBQuadExpr.Value
GRBTempConstr
GRBColumn +
GRBColumn()
GRBColumn.AddTerm()
GRBColumn.AddTerms()
GRBColumn.Clear()
GRBColumn.GetCoeff()
GRBColumn.GetConstr()
GRBColumn.Remove()
GRBColumn.Size
Overloaded Operators +
operator <=
operator >=
operator ==
operator +
operator -
operator *
operator /
implicit cast
GRBCallback +
GRBCallback()
GRBCallback.Abort()
GRBCallback.AddCut()
GRBCallback.AddLazy()
GRBCallback.GetDoubleInfo()
GRBCallback.GetIntInfo()
GRBCallback.GetNodeRel()
GRBCallback.GetSolution()
GRBCallback.GetStringInfo()
GRBCallback.SetSolution()
GRBCallback.StopOneMultiObj()
GRBCallback.UseSolution()
GRBException +
GRBException()
GRBException.ErrorCode
GRBBatch +
GRBBatch()
GRBBatch.Abort()
GRBBatch.Discard()
GRBBatch.GetJSONSolution()
GRBBatch.Get()
GRBBatch.Retry()
GRBBatch.Update()
GRBBatch.WriteJSONSolution()
GRB +
Constants
GRB.CharAttr
GRB.DoubleAttr
GRB.DoubleParam
GRB.IntAttr
GRB.IntParam
GRB.StringAttr
GRB.StringParam
Python API Overview
Python API Details
Global Functions +
models()
disposeDefaultEnv()
multidict()
paramHelp()
quicksum()
read()
readParams()
resetParams()
setParam()
system()
writeParams()
Model +
Model()
Model.addConstr()
Model.addConstrs()
Model.addGenConstrXxx()
Model.addGenConstrMax()
Model.addGenConstrMin()
Model.addGenConstrAbs()
Model.addGenConstrAnd()
Model.addGenConstrOr()
Model.addGenConstrIndicator()
Model.addGenConstrPWL()
Model.addGenConstrPoly()
Model.addGenConstrExp()
Model.addGenConstrExpA()
Model.addGenConstrLog()
Model.addGenConstrLogA()
Model.addGenConstrPow()
Model.addGenConstrSin()
Model.addGenConstrCos()
Model.addGenConstrTan()
Model.addLConstr()
Model.addMConstrs()
Model.addMQConstr()
Model.addMVar()
Model.addQConstr()
Model.addRange()
Model.addSOS()
Model.addVar()
Model.addVars()
Model.cbCut()
Model.cbGet()
Model.cbGetNodeRel()
Model.cbGetSolution()
Model.cbLazy()
Model.cbSetSolution()
Model.cbStopOneMultiObj()
Model.cbUseSolution()
Model.chgCoeff()
Model.computeIIS()
Model.copy()
Model.discardConcurrentEnvs()
Model.discardMultiobjEnvs()
Model.dispose()
Model.feasRelaxS()
Model.feasRelax()
Model.fixed()
Model.getA()
Model.getAttr()
Model.getCoeff()
Model.getCol()
Model.getConcurrentEnv()
Model.getConstrByName()
Model.getConstrs()
Model.getGenConstrMax()
Model.getGenConstrMin()
Model.getGenConstrAbs()
Model.getGenConstrAnd()
Model.getGenConstrOr()
Model.getGenConstrIndicator()
Model.getGenConstrPWL()
Model.getGenConstrPoly()
Model.getGenConstrExp()
Model.getGenConstrExpA()
Model.getGenConstrLog()
Model.getGenConstrLogA()
Model.getGenConstrPow()
Model.getGenConstrSin()
Model.getGenConstrCos()
Model.getGenConstrTan()
Model.getGenConstrs()
Model.getJSONSolution()
Model.getMultiobjEnv()
Model.getObjective()
Model.getParamInfo()
Model.getPWLObj()
Model.getQConstrs()
Model.getQCRow()
Model.getRow()
Model.getSOS()
Model.getSOSs()
Model.getTuneResult()
Model.getVarByName()
Model.getVars()
Model.message()
Model.optimize()
Model.optimizeBatch()
Model.presolve()
Model.printAttr()
Model.printQuality()
Model.printStats()
Model.read()
Model.relax()
Model.remove()
Model.reset()
Model.resetParams()
Model.setAttr()
Model.setMObjective()
Model.setObjective()
Model.setObjectiveN()
Model.setPWLObj()
Model.setParam()
Model.singleScenarioModel()
Model.terminate()
Model.tune()
Model.update()
Model.write()
Var +
Var.getAttr()
Var.sameAs()
Var.index
Var.setAttr()
MVar +
MVar()
MVar.copy()
MVar.getAttr()
MVar.setAttr()
MVar.sum()
Constr +
Constr.getAttr()
Constr.index
Constr.sameAs()
Constr.setAttr()
QConstr +
QConstr.getAttr()
QConstr.setAttr()
SOS +
SOS.getAttr()
GenConstr +
GenConstr.getAttr()
GenConstr.setAttr()
LinExpr +
LinExpr()
LinExpr.add()
LinExpr.addConstant()
LinExpr.addTerms()
LinExpr.clear()
LinExpr.copy()
LinExpr.getConstant()
LinExpr.getCoeff()
LinExpr.getValue()
LinExpr.getVar()
LinExpr.remove()
LinExpr.size()
LinExpr.__eq__()
LinExpr.__le__()
LinExpr.__ge__()
QuadExpr +
QuadExpr()
QuadExpr.add()
QuadExpr.addConstant()
QuadExpr.addTerms()
QuadExpr.clear()
QuadExpr.copy()
QuadExpr.getCoeff()
QuadExpr.getLinExpr()
QuadExpr.getValue()
QuadExpr.getVar1()
QuadExpr.getVar2()
QuadExpr.remove()
QuadExpr.size()
QuadExpr.__eq__()
QuadExpr.__le__()
QuadExpr.__ge__()
GenExpr
MLinExpr +
MLinExpr.copy()
MLinExpr.getValue()
MLinExpr.__eq__()
MLinExpr.__le__()
MLinExpr.__ge__()
MQuadExpr +
MQuadExpr.copy()
MQuadExpr.getValue()
MQuadExpr.__eq__()
MQuadExpr.__le__()
MQuadExpr.__ge__()
TempConstr
Column +
Column()
Column.addTerms()
Column.clear()
Column.copy()
Column.getCoeff()
Column.getConstr()
Column.remove()
Column.size()
Callbacks
GurobiError
Env +
Env()
Env.ClientEnv()
Env.CloudEnv()
Env.resetParams()
Env.setParam()
Env.start()
Env.writeParams()
Env.dispose()
Batch +
Batch()
Batch.abort()
Batch.discard()
Batch.dispose()
Batch.getJSONSolution()
Batch.retry()
Batch.update()
Batch.writeJSONSolution()
GRB +
Constants
GRB.Attr
GRB.Param
tuplelist +
tuplelist()
tuplelist.select()
tuplelist.clean()
tuplelist.__contains__()
tupledict +
tupledict()
tupledict.select()
tupledict.sum()
tupledict.prod()
tupledict.clean()
General Constraint Helper Functions +
abs_()
and_()
max_()
min_()
or_()
MATLAB API Overview
MATLAB API Details
Common Arguments +
The model argument
The params argument
The env argument
Solving a Model +
gurobi()
gurobi_iis()
gurobi_feasrelax()
gurobi_relax()
Input/Output +
gurobi_read()
gurobi_write()
Using Gurobi within MATLAB's Problem-Based Optimization
Setting up the Gurobi MATLAB interface
R API Overview
R API Details
Common Arguments +
The model argument
The params argument
The env argument
Solving a Model +
gurobi()
gurobi_iis()
gurobi_feasrelax()
gurobi_relax()
Input/Output +
gurobi_read()
gurobi_write()
Installing the R package
Variables and Constraints and Objectives
Variables
Constraints
Objectives
Tolerances and Ill Conditioning -- A Caveat
Environments
Algorithmic parameters
Startup parameters +
Setting Parameters in the License File
Setting Parameters in Empty Environments
Empty Environment Examples
Releasing shared resources
Attributes
Model Attributes +
NumConstrs
NumVars
NumSOS
NumQConstrs
NumGenConstrs
NumNZs
DNumNZs
NumQNZs
NumQCNZs
NumIntVars
NumBinVars
NumPWLObjVars
ModelName
ModelSense
ObjCon
ObjVal
ObjBound
ObjBoundC
PoolObjBound
PoolObjVal
MIPGap
Runtime
Status
SolCount
IterCount
BarIterCount
NodeCount
IsMIP
IsQP
IsQCP
IsMultiObj
IISMinimal
MaxCoeff
MinCoeff
MaxBound
MinBound
MaxObjCoeff
MinObjCoeff
MaxRHS
MinRHS
MaxQCCoeff
MinQCCoeff
MaxQCLCoeff
MinQCLCoeff
MaxQCRHS
MinQCRHS
MaxQObjCoeff
MinQObjCoeff
Kappa
KappaExact
FarkasProof
TuneResultCount
NumStart
LicenseExpiration
Server
Variable Attributes +
LB
UB
Obj
VarName
VTag
VType
X
Xn
RC
BarX
Start
VarHintVal
VarHintPri
BranchPriority
Partition
VBasis
PStart
IISLB
IISUB
PWLObjCvx
SAObjLow
SAObjUp
SALBLow
SALBUp
SAUBLow
SAUBUp
UnbdRay
Linear Constraint Attributes +
Sense
RHS
ConstrName
CTag
Pi
Slack
CBasis
DStart
Lazy
IISConstr
SARHSLow
SARHSUp
FarkasDual
SOS Attributes +
IISSOS
Quadratic Constraint Attributes +
QCSense
QCRHS
QCName
QCPi
QCSlack
QCTag
IISQConstr
General Constraint Attributes +
FuncPieceError
FuncPieceLength
FuncPieceRatio
FuncPieces
GenConstrType
GenConstrName
IISGenConstr
Quality Attributes +
BoundVio
BoundSVio
BoundVioIndex
BoundSVioIndex
BoundVioSum
BoundSVioSum
ConstrVio
ConstrSVio
ConstrVioIndex
ConstrSVioIndex
ConstrVioSum
ConstrSVioSum
ConstrResidual
ConstrSResidual
ConstrResidualIndex
ConstrSResidualIndex
ConstrResidualSum
ConstrSResidualSum
DualVio
DualSVio
DualVioIndex
DualSVioIndex
DualVioSum
DualSVioSum
DualResidual
DualSResidual
DualResidualIndex
DualSResidualIndex
DualResidualSum
DualSResidualSum
ComplVio
ComplVioIndex
ComplVioSum
IntVio
IntVioIndex
IntVioSum
Multi-objective Attributes +
ObjN
ObjNCon
ObjNPriority
ObjNWeight
ObjNRelTol
ObjNAbsTol
ObjNVal
ObjNName
NumObj
Multi-Scenario Attributes +
ScenNLB
ScenNUB
ScenNObj
ScenNRHS
ScenNName
ScenNObjBound
ScenNObjVal
ScenNX
NumScenarios
Batch Attributes +
BatchErrorCode
BatchErrorMessage
BatchID
BatchStatus
Attribute Examples +
C Attribute Examples
C++ Attribute Examples
C# Attribute Examples
Java Attribute Examples
Python Attribute Examples
Visual Basic Attribute Examples
Parameters
Parameter Guidelines +
Continuous Models
MIP Models
Parameter Descriptions –
AggFill
Aggregate
BarConvTol
BarCorrectors
BarHomogeneous
BarIterLimit
BarOrder
BarQCPConvTol
BestBdStop
BestObjStop
BQPCuts
BranchDir
CliqueCuts
CloudAccessID
CloudHost
CloudSecretKey
CloudPool
ComputeServer
ConcurrentJobs
ConcurrentMIP
ConcurrentSettings
CoverCuts
Crossover
CrossoverBasis
CSAPIAccessID
CSAPISecret
CSAppName
CSAuthToken
CSBatchMode
CSClientLog
CSGroup
CSIdleTimeout
CSManager
CSPriority
CSQueueTimeout
CSRouter
CSTLSInsecure
CutAggPasses
Cutoff
CutPasses
Cuts
DegenMoves
Disconnected
DisplayInterval
DistributedMIPJobs
DualReductions
FeasibilityTol
FeasRelaxBigM
FlowCoverCuts
FlowPathCuts
FuncPieceError
FuncPieceLength
FuncPieceRatio
FuncPieces
FuncMaxVal
GomoryPasses
GUBCoverCuts
Heuristics
IgnoreNames
IISMethod
ImpliedCuts
ImproveStartGap
ImproveStartNodes
ImproveStartTime
InfProofCuts
InfUnbdInfo
InputFile
IntFeasTol
IterationLimit
JobID
JSONSolDetail
LazyConstraints
LogFile
LogToConsole
MarkowitzTol
Method
MinRelNodes
MIPFocus
MIPGap
MIPGapAbs
MIPSepCuts
MIQCPMethod
MIRCuts
ModKCuts
MultiObjMethod
MultiObjPre
NetworkCuts
NodefileDir
NodefileStart
NodeLimit
NodeMethod
NonConvex
NormAdjust
NumericFocus
ObjNumber
ObjScale
OptimalityTol
OutputFlag
PartitionPlace
PerturbValue
PoolGap
PoolSearchMode
PoolSolutions
PreCrush
PreDepRow
PreDual
PreMIQCPForm
PrePasses
PreQLinearize
Presolve
PreSOS1BigM
PreSOS2BigM
PreSparsify
ProjImpliedCuts
PSDTol
PumpPasses
QCPDual
Quad
Record
ResultFile
RINS
RelaxLiftCuts
RLTCuts
ScaleFlag
ScenarioNumber
Seed
ServerPassword
ServerTimeout
Sifting
SiftMethod
SimplexPricing
SolutionLimit
SolFiles
SolutionNumber
StartNodeLimit
StartNumber
StrongCGCuts
SubMIPCuts
SubMIPNodes
Symmetry
Threads
TimeLimit
TokenServer
TSPort
TuneCriterion
TuneJobs
TuneOutput
TuneResults
TuneTimeLimit
TuneTrials
UpdateMode
UserName
VarBranch
WorkerPassword
WorkerPool
ZeroHalfCuts
ZeroObjNodes
Parameter Examples +
C Parameter Examples
C++ Parameter Examples
C# Parameter Examples
Java Parameter Examples
MATLAB Parameter Examples
Python Parameter Examples
R Parameter Examples
Visual Basic Parameter Examples
Optimization Status Codes
Batch Status Codes
Callback Codes
Error Codes
Model File Formats
MPS format
REW format
LP format
RLP format
ILP format
OPB format
MST format
HNT format
ORD format
BAS format
SOL format
JSON solution format
ATTR format
PRM format
Logging
Simplex Logging
Barrier Logging
Sifting Logging
MIP Logging
Solution Pool and Multi-Scenario Logging
Multi-Objective Logging
Distributed MIP Logging
Gurobi Command-Line Tool
Solving a Model
Replaying Recording Files
Solution Pool
Finding Multiple Solutions
Examples
Retrieving Solutions
Subtleties and Limitations
Multiple Objectives
Specifying Multiple Objectives
Working With Multiple Objective
Additional Details
Multiple Scenarios
Definition of a Multi-Scenario Model
Specifying Multiple Scenarios
Logging
Retrieving Solutions for Multiple Scenarios
Tips and Tricks
Limitations and Additional Considerations
Batch Optimization
Setting Up a Batch Environment
Tagging Variables or Constraints
Submitting a Batch Optimization Request
Interacting with Batch Requests
Interpreting the JSON Solution
A Complete Example
Recording API Calls
Recording
Replay
Limitations
Concurrent Optimizer
Parameter Tuning Tool
Command-Line Tuning
Tuning API
Gurobi Instant Cloud
Client Setup
Instant Cloud Setup
Copyright Notice for 3rd Party Libraries
Gurobi Guidelines for Numerical Issues
Avoid rounding of input
Real numbers are not real
Tolerances and user-scaling +
Gurobi tolerances and the limitations of double-precision arithmetic
Why scaling and geometry is relevant
Recommended ranges for variables and constraints
Improving ranges for variables and constraints
Advanced user scaling
Avoid hiding large coefficients
Dealing with big-M constraints
Does my model have numerical issues?
Solver parameters to manage numerical issues +
Presolve
Choosing the right algorithm
Making the algorithm less sensitive
Instability and the geometry of optimization problems +
The case of linear systems:
The geometry of linear optimization problems
Multiple optimal solutions
Dealing with epsilon-optimal solutions
Thin feasible regions
Optimizing over the circle:
Optimizing over thin regions:
Stability and convergence
Further reading
Source code examples: +
Source code for the experiment of optimizing over a circle
Source code for the experiment on a thin feasible region
Source code for the experiment with column scalings
next up previous
Next: PoolGap Up: Parameter Descriptions Previous: PartitionPlace


PerturbValue

Simplex perturbation
 Type: double
 Default value: 0.0002
 Minimum value: 0
 Maximum value: Infinity

Magnitude of the simplex perturbation. Note that perturbation is only applied when progress has stalled, so the parameter will often have no effect.

For examples of how to query or modify parameter values from our different APIs, refer to our Parameter Examples.

next up previous
Next: PoolGap Up: Parameter Descriptions Previous: PartitionPlace