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# init(inputMetaParameterDefinition:envelope:identifier:)

Creates a specification for a named metaparameter that the app plots on a graph defined by the given set of curves.

```
convenience init(inputMetaParameterDefinition: PHASENumberMetaParameterDefinition, envelope: PHASEEnvelope, identifier: String)
```

## Parameters

`inputMetaParameterDefinition`

A metaparameter that contains an input value.

`envelope`

A set of curves that graph the input value.

`identifier`

A unique name for the metaparameter specification.

---

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