Component Usage

SimBiology^® lets you find species, parameters, and compartments that are not used in a model. You can also query how a particular quantity is used by other expressions such as a parameter being used as a reaction rate constant or species being used in an event.

From the command line, use the findUnusedComponents function to look for unused model components and the findUsages function to see how a component is used in expressions. If you are using the SimBiology Model Builder app, in the Browser pane, expand Model Assessment Tools. Then click Unused to see a list of unused quantities. To look for usages of a quantity, click the quantity block in the diagram or in the browser table. Then in the Property Editor pane, look at the Usages section.

Species Usage

A species is used when it is referenced in any of the following properties of other components:

• The Reaction or ReactionRate property of a Reaction object,

• The ParameterVariableNames or SpeciesVariableNames property of a KineticLaw object,

• The Rule property of a Rule object,

• The Trigger or EventFcns property of an Event object,

• The Expression property of an observable object, and

• The TargetName property of a ScheduleDose object or RepeatDose object.

Use the object method findUsages to find out how a species is used.

Parameter Usage

A parameter is used when it is referenced in any of the following properties of other components:

• The ReactionRate property of a Reaction object,

• The ParameterVariableNames property of a KineticLaw object,

• The Rule property of a Rule object,

• The Trigger or EventFcns property of an Event object,

• The Expression property of an observable object,

• The Content property of a Variant object, and

• The DurationParameterName or LagParameterName property of a ScheduleDose object or RepeatDose object.

• The Amount, Rate, Interval, StartTime, or RepeatCount property of a RepeatDose object.

Use the object method findUsages to find out how a parameter is used.

Compartment Usage

A compartment is used when it is referenced in any of the following properties of other components:

• The Parent property of a Species object,

• The Owner property of a Compartment object,

• The ReactionRate property of a Reaction object,

• The ParameterVariableNames property of a KineticLaw object,

• The Rule property of a Rule object,

• The Trigger or EventFcns property of an Event object,

• The Expression property of an observable object, and

• The Content property of a Variant object.

Use the object method findUsages to find out how a compartment is used.

Observable Usage

An observable object is used when it is referenced in the Expression property of another observable.

Use the object method findUsages to find out how an observable object is used.

Unit and UnitPrefix Usage

A unit or unit prefix is used when it is referenced in any of the following properties of other components:

• The Composition property of all units in the BuiltInLibrary and UserDefinedLibrary,

• The Units property of a species, compartment, parameter, or observable object in the specified models,

• The TimeUnits property of all specified doses,

• The AmountUnits property of all specified doses, and

• The RateUnits property of all specified doses.

Use the object method findUsages to find out how a Unit or UnitPrefix object is used.

Abstract Kinetic Law Usage

An abstract kinetic law object aklObj can only be used by a Reaction object robj. It is used when:

• The KineticLaw property of the reaction object is not empty, and

• robj.KineticLaw.KineticLawName matches the name of the abstract kinetic law aklObj.Name.

Use the object method findUsages to find out how an AbstractKineticLaw object is used.