Attribute reference

Attributes are queried using get_attribute and set using set_attribute.

Model attributes

Name	Type	Description
`ModelName`	`String`	Name of the model
`NumberOfConstraints`	`Int`	Number of constraints in the model
`NumberOfVariables`	`Int`	Number of variables in the model
`ObjectiveValue`	`T`	Objective value of the current primal solution
`DualObjectiveValue`	`T`	Objective value of the current dual solution
`ObjectiveConstant`	`T`	Value of the objective constant
`ObjectiveSense`		Optimization sense
`Status`		Model status
`BarrierIterations`	`Int`	Number of barrier iterations
`SolutionTime`	`Float64`	Solution time, in seconds

Variable attributes

Name	Type	Description
`VariableLowerBound`	`T`	Variable lower bound
`VariableUpperBound`	`T`	Variable upper bound
`VariableObjectiveCoeff`	`T`	Variable objective coefficient
`VariableName`	`String`	Variable name

Constraint attributes

Name	Type	Description
`ConstraintLowerBound`	`T`	Constraint lower bound
`ConstraintUpperBound`	`T`	Constraint upper bound
`ConstraintName`	`String`	Constraint name

Reference

Model attributes

Tulip.BarrierIterations — Type

BarrierIterations

Number of iterations of the barrier algorithm in the last call.

This number may be zero in the following cases:

the model has been solved yet
presolve solved the model
the initial solution was optimal

Type: Int

Modifiable: No

Examples

Tulip.get_attribute(model, Tulip.BarrierIterations())

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Tulip.DualObjectiveValue — Type

DualObjectiveValue

Objective value of the current dual solution.

Type: T

Modifiable: No

Examples

Tulip.get_attribute(model, Tulip.DualObjectiveValue())

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Tulip.ModelName — Type

ModelName

The name of the model.

Type: String

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.ModelName(), "lp_example")
Tulip.get_attribute(model, Tulip.ModelName())

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Tulip.NumberOfConstraints — Type

NumberOfConstraints

Number of constraints in the model.

Type: Int

Modifiable: No

Examples

Tulip.get_attribute(model, Tulip.NumberOfConstraints())

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Tulip.NumberOfVariables — Type

NumberOfVariables

Number of variables in the model.

Type: Int

Modifiable: No

Examples

Tulip.get_attribute(model, Tulip.NumberOfVariables())

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Tulip.ObjectiveConstant — Type

ObjectiveConstant

Constant objective offset, defaults to zero.

Type: T

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.ObjectiveConstant(), zero(T))
Tulip.get_attribute(model, Tulip.ObjectiveConstant())

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Tulip.ObjectiveSense — Type

ObjectiveSense

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Tulip.ObjectiveValue — Type

ObjectiveValue

Objective value of the current primal solution.

Type: T

Modifiable: No

Examples

Tulip.get_attribute(model, Tulip.ObjectiveValue())

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Tulip.SolutionTime — Type

SolutionTime

Total solution time, in seconds.

Type: Float64

Modifiable: No

Examples

Tulip.get_attribute(model, Tulip.SolutionTime())

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Tulip.Status — Type

Status

Model status

Type:

Modifiable: No

Examples

Tulip.get(model, Tulip.Status())

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Variable attributes

Tulip.VariableLowerBound — Type

VariableLowerBound

Variable lower bound.

Type: T

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.VariableLowerBound(), 1, zero(T))
Tulip.get_attribute(model, Tulip.VariableLowerBound(), 1)

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Tulip.VariableName — Type

VariableName

Name of the variable.

Type: String

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.VariableName(), 1, "x1")
Tulip.get_attribute(model, Tulip.VariableName(), 1)

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Tulip.VariableObjectiveCoeff — Type

VariableObjectiveCoeff

Objective coefficient of the variable.

Type: T

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.VariableObjectiveCoeff(), 1, one(T))
Tulip.get_attribute(model, Tulip.VariableObjectiveCoeff(), 1)

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Tulip.VariableUpperBound — Type

VariableUpperBound

Variable upper bound.

Type: T

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.VariableUpperBound(), 1, one(T))
Tulip.get_attribute(model, Tulip.VariableUpperBound(), 1)

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Constraint attributes

Tulip.ConstraintLowerBound — Type

ConstraintLowerBound

Constraint lower bound.

Type: T

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.ConstraintLowerBound(), 1, zero(T))
Tulip.get_attribute(model, Tulip.ConstraintLowerBound(), 1)

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Tulip.ConstraintName — Type

ConstraintName

Name of the constraint.

Type: String

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.ConstraintName(), 1, "c1")
Tulip.get_attribute(model, Tulip.ConstraintName(), 1)

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Tulip.ConstraintUpperBound — Type

ConstraintUpperBound

Constraint upper bound.

Type: T

Modifiable: Yes

Examples

Tulip.set_attribute(model, Tulip.ConstraintUpperBound(), 1, one(T))
Tulip.get_attribute(model, Tulip.ConstraintUpperBound(), 1)

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